in text citation for literature review

Citation Styles

• Chicago Style
• Annotated Bibliographies

What is a Lit Review?

How to write a lit review.

• Video Introduction to Lit Reviews

Main Objectives

Examples of lit reviews, additional resources.

• Zotero (Citation Management)

What is a literature review?

• Either a complete piece of writing unto itself or a section of a larger piece of writing like a book or article
• A thorough and critical look at the information and perspectives that other experts and scholars have written about a specific topic
• A way to give historical perspective on an issue and show how other researchers have addressed a problem
• An analysis of sources based on your own perspective on the topic
• Based on the most pertinent and significant research conducted in the field, both new and old

• A descriptive list or collection of summaries of other research without synthesis or analysis
• An annotated bibliography
• A literary review (a brief, critical discussion about the merits and weaknesses of a literary work such as a play, novel or a book of poems)
• Exhaustive; the objective is not to list as many relevant books, articles, reports as possible
• To convey to your reader what knowledge and ideas have been established on a topic
• To explain what the strengths and weaknesses of that knowledge and those ideas might be
• To learn how others have defined and measured key concepts    
• To keep the writer/reader up to date with current developments and historical trends in a particular field or discipline
• To establish context for the argument explored in the rest of a paper
• To provide evidence that may be used to support your own findings
• To demonstrate your understanding and your ability to critically evaluate research in the field
• To suggest previously unused or underused methodologies, designs, and quantitative and qualitative strategies
• To identify gaps in previous studies and flawed methodologies and/or theoretical approaches in order to avoid replication of mistakes
• To help the researcher avoid repetition of earlier research
• To suggest unexplored populations
• To determine whether past studies agree or disagree and identify strengths and weaknesses on both sides of a controversy in the literature

• Choose a topic that is interesting to you; this makes the research and writing process more enjoyable and rewarding.
• For a literature review, you'll also want to make sure that the topic you choose is one that other researchers have explored before so that you'll be able to find plenty of relevant sources to review.

• Your research doesn't need to be exhaustive. Pay careful attention to bibliographies. Focus on the most frequently cited literature about your topic and literature from the best known scholars in your field. Ask yourself: "Does this source make a significant contribution to the understanding of my topic?"
• Reading other literature reviews from your field may help you get ideas for themes to look for in your research. You can usually find some of these through the library databases by adding literature review as a keyword in your search.
• Start with the most recent publications and work backwards. This way, you ensure you have the most current information, and it becomes easier to identify the most seminal earlier sources by reviewing the material that current researchers are citing.

The organization of your lit review should be determined based on what you'd like to highlight from your research. Here are a few suggestions:

• Chronology : Discuss literature in chronological order of its writing/publication to demonstrate a change in trends over time or to detail a history of controversy in the field or of developments in the understanding of your topic.  
• Theme: Group your sources by subject or theme to show the variety of angles from which your topic has been studied. This works well if, for example, your goal is to identify an angle or subtopic that has so far been overlooked by researchers.  
• Methodology: Grouping your sources by methodology (for example, dividing the literature into qualitative vs. quantitative studies or grouping sources according to the populations studied) is useful for illustrating an overlooked population, an unused or underused methodology, or a flawed experimental technique.

• Be selective. Highlight only the most important and relevant points from a source in your review.
• Use quotes sparingly. Short quotes can help to emphasize a point, but thorough analysis of language from each source is generally unnecessary in a literature review.
• Synthesize your sources. Your goal is not to make a list of summaries of each source but to show how the sources relate to one another and to your own work.
• Make sure that your own voice and perspective remains front and center. Don't rely too heavily on summary or paraphrasing. For each source, draw a conclusion about how it relates to your own work or to the other literature on your topic.
• Be objective. When you identify a disagreement in the literature, be sure to represent both sides. Don't exclude a source simply on the basis that it does not support your own research hypothesis.
• At the end of your lit review, make suggestions for future research. What subjects, populations, methodologies, or theoretical lenses warrant further exploration? What common flaws or biases did you identify that could be corrected in future studies?

• Double check that you've correctly cited each of the sources you've used in the citation style requested by your professor (APA, MLA, etc.) and that your lit review is formatted according to the guidelines for that style.

Your literature review should:

• Be focused on and organized around your topic.
• Synthesize your research into a summary of what is and is not known about your topic.
• Identify any gaps or areas of controversy in the literature related to your topic.
• Suggest questions that require further research.
• Have your voice and perspective at the forefront rather than merely summarizing others' work.
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• Literature Review Tutorials and Samples - Wilson Library at University of La Verne
• Literature Reviews: Introduction - University Library at Georgia State
• Literature Reviews - The Writing Center at UNC Chapel Hill
• Writing a Literature Review - Boston College Libraries
• Write a Literature Review - University Library at UC Santa Cruz
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APA (7th Edition) Referencing Guide

• Information for EndNote Users
• Authors - Numbers, Rules and Formatting

Everything must match!

Types of citations, in-text citations, quoting, summarising and paraphrasing, example text with in-text referencing, slightly tricky in-text citations, organisation as an author, secondary citation (works referred to in other works), what do i do if there are no page numbers.

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• In-Text Citation Checklist Checklist provided by APA to help make sure your in-text citations are correct.

There are two basic ways to cite someone's work in text.

In narrative citations , the authors are part of the sentence - you are referring to them by name. For example:

Becker (2013) defined gamification as giving the mechanics of principles of a game to other activities.

Cho and Castañeda (2019) noted that game-like activities are frequently used in language classes that adopt mobile and computer technologies.

In parenthetical citations , the authors are not mentioned in the sentence, just the content of their work. Place the citation at the end of the sentence or clause where you have used their information. The author's names are placed in the brackets (parentheses) with the rest of the citation details:

Gamification involves giving the mechanics or principles of a game to another activity (Becker, 2013).

Increasingly, game-like activities are frequently used in language classes that adopt mobile and computer technologies (Cho & Castañeda, 2019).

Using references in text

For APA, you use the authors' surnames only and the year in text. If you are using a direct quote, you will also need to use a page number.

Narrative citations:

If an in-text citation has the authors' names as part of the sentence (that is, outside of brackets) place the year and page numbers in brackets immediately after the name, and use 'and' between the authors' names:  Jones and Smith (2020, p. 29)

Parenthetical citations:

If an in-text citation has the authors' names in brackets use "&" between the authors' names :  (Jones & Smith, 2020, p. 29).

Note: Some lecturers want page numbers for all citations, while some only want page numbers with direct quotes. Check with your lecturer to see what you need to do for your assignment. If the direct quote starts on one page and finishes on another, include the page range (Jones & Smith, 2020, pp. 29-30).

1 author

Smith (2020) found that "the mice disappeared within minutes" (p. 29).

The author stated "the mice disappeared within minutes" (Smith, 2020, p. 29).

Jones and Smith (2020) found that "the mice disappeared within minutes" (p. 29).

The authors stated "the mice disappeared within minutes" (Jones & Smith, 2020, p. 29).

For 3 or more authors , use the first author and "et al." for all in-text citations

Green et al.'s (2019) findings indicated that the intervention was not based on evidence from clinical trials.

It appears the intervention was not based on evidence from clinical trials (Green et al., 2019).

If you cite more than one work in the same set of brackets in text , your citations will go in the same order in which they will appear in your reference list (i.e. alphabetical order, then oldest to newest for works by the same author) and be separated by a semi-colon. E.g.:

• (Corbin, 2015; James & Waterson, 2017; Smith et al., 2016).
• (Corbin, 2015; 2018)
• (Queensland Health, 2017a; 2017b)
• Use only the   surnames   of your authors   in text   (e.g., Smith & Brown, 2014) - however, if you have two authors with the same surname who have published in the same year, then you will need to use their initials to distinguish between the two of them (e.g., K. Smith, 2014; N. Smith, 2014).   Otherwise, do not use initials in text .

If your author isn't an "author".

Whoever is in the "author" position of the refence in the references list is treated like an author in text. So, for example, if you had an edited book and the editors of the book were in the "author" position at the beginning of the reference, you would treat them exactly the same way as you would an author - do not include any other information. The same applies for works where the "author" is an illustrator, producer, composer, etc.

• Summarising
• Paraphrasing

It is always a good idea to keep direct quotes to a minimum. Quoting doesn't showcase your writing ability - all it shows is that you can read (plus, lecturers hate reading assignments with a lot of quotes).

You should only use direct quotes if the exact wording is important , otherwise it is better to paraphrase.

If you feel a direct quote is appropriate, try to keep only the most important part of the quote and avoid letting it take up the entire sentence - always start or end the sentence with your own words to tie the quote back into your assignment. Long quotes (more than 40 words) are called "block quotes" and are rarely used in most subject areas (they mostly belong in Literature, History or similar subjects). Each referencing style has rules for setting out a block quote. Check with your style guide .

It has been observed that "pink fairy armadillos seem to be extremely susceptible to stress" (Superina, 2011, p. 6).

NB! Most referencing styles will require a page number to tell readers where to find the original quote.

It is a type of paraphrasing, and you will be using this frequently in your assignments, but note that summarising another person's work or argument isn't showing how you make connections or understand implications. This is preferred to quoting, but where possible try to go beyond simply summarising another person's information without "adding value".

And, remember, the words must be your own words . If you use the exact wording from the original at any time, those words must be treated as a direct quote.

All information must be cited, even if it is in your own words.

Superina (2011) observed a captive pink fairy armadillo, and noticed any variation in its environment could cause great stress.

NB! Some lecturers and citation styles want page numbers for everything you cite, others only want page numbers for direct quotes. Check with your lecturer.

Paraphrasing often involves commenting about the information at the same time, and this is where you can really show your understanding of the topic. You should try to do this within every paragraph in the body of your assignment.

When paraphrasing, it is important to remember that using a thesaurus to change every other word isn't really paraphrasing. It's patchwriting , and it's a kind of plagiarism (as you are not creating original work).

Use your own voice! You sound like you when you write - you have a distinctive style that is all your own, and when your "tone" suddenly changes for a section of your assignment, it looks highly suspicious. Your lecturer starts to wonder if you really wrote that part yourself. Make sure you have genuinely thought about how *you* would write this information, and that the paraphrasing really is in your own words.

Always cite your sources! Even if you have drawn from three different papers to write this one sentence, which is completely in your own words, you still have to cite your sources for that sentence (oh, and excellent work, by the way).

Captive pink fairy armadillos do not respond well to changes in their environment and can be easily stressed (Superina, 2011).

NB! Some lecturers and citation styles want page numbers for all citations, others only want them for direct quotes. Check with your lecturer.

This example paragraph contains mouse-over text. Run your mouse over the paragraph to see notes on formatting.

Excerpt from "The Big Fake Essay"

You can read the entire Big Fake Essay on the Writing Guide. It includes more details about academic writing and the formatting of essays.

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When you have multiple authors with the same surname who published in the same year:

If your authors have different initials, then include the initials:

As A. Smith (2016) noted...

...which was confirmed by J.G. Smith's (2016) study.

(A. Smith, 2016; J. G. Smith, 2016).

If your authors have the same initials, then include the name:

As Adam Smith noted...

...which was confirmed by Amy Smith's (2016) study.

(Adam Smith, 2016; Amy Smith, 2016).

Note: In your reference list, you would include the author's first name in [square brackets] after their initials:

Smith, A. [Adam]. (2016)...

Smith, A. [Amy]. (2016)...

When you have multiple works by the same author in the same year:

In your reference list, you will have arranged the works alphabetically by title (see the page on Reference Lists for more information). This decides which reference is "a", "b", "c", and so on. You cite them in text accordingly:

Asthma is the most common disease affecting the Queensland population (Queensland Health, 2017b). However, many people do not know how to manage their asthma symptoms (Queensland Health, 2017a).

When you have multiple works by the same author in different years:

Asthma is the most common disease affecting the Queensland population (Queensland Health, 2017, 2018). 

When you do not have an author, and your reference list entry begins with the title:

Use the title in place of the author's name, and place it in "quotation marks" if it is the title of an article or book chapter, or in italics if the title would go in italics in your reference list:

During the 2017 presidential inauguration, there were some moments of awkwardness ("Mrs. Obama Says ‘Lovely Frame’", 2018).

Note: You do not need to use the entire title, but a reasonable portion so that it does not end too abruptly - "Mrs. Obama Says" would be too abrupt, but the full title "Mrs. Obama Says 'Lovely Frame' in Box During Awkward Handoff" is unecessarily long. You should also use title case for titles when referring to them in the text of your work.

If there are no page numbers, you can include any of the following in the in-text citation:

• "On Australia Day 1938 William Cooper ... joined forces with Jack Patten and William Ferguson ... to hold a Day of Mourning to draw attention to the losses suffered by Aboriginal people at the hands of the whiteman" (National Museum of Australia, n.d., para. 4).
• "in 1957 news of a report by the Western Australian government provided the catalyst for a reform movement" (National Museum of Australia, n.d., The catalyst for change section, para. 1)
• "By the end of this year of intense activity over 100,000 signatures had been collected" (National Museum of Australia, n.d., "petition gathering", para. 1).

When you are citing a classical work, like the Bible or the Quran:

References to works of scripture or other classical works are treated differently to regular citations. See the APA Blog's entry for more details:

Happy Holiday Citing: Citation of Classical Works . (Please note, this document is from the 6th edition of APA).

In text citation:

If the name of the organisation first appears in a narrative citation, include the abbreviation before the year in brackets, separated with a comma. Use the official acronym/abreviation if you can find it. Otherwise check with your lecturer for permission to create your own acronyms.

Australian Bureau of Statistics (ABS, 2013) shows that...

The Queensland Department of Education (DoE, 2020) encourages students to... (please note, Queensland isn't part of the department's name, it is used in the sentence to provide clarity)

If the name of the organisation first appears in a citation in brackets, include the abbreviation in square brackets.

(Australian Bureau of Statistics [ABS], 2013)

(Department of Education [DoE], 2020)

In the second and subsequent citations, only include the abbreviation or acronym

ABS  (2013) found that ...

DoE (2020) instructs teachers to...

This is disputed ( ABS , 2013).

Resources are designed to support "emotional learning pedagogy" (DoE, 2020)

In the reference list:

Use the full name of the organisation in the reference list.

Australian Institute of Health and Welfare. (2017).  Australia's welfare 2017 . https://www.aihw.gov.au/reports/australias-welfare/australias-welfare-2017/contents/table-of-contents

Department of Education. (2020, April 22). Respectful relationships education program . Queensland Government. https://education.qld.gov.au/curriculum/stages-of-schooling/respectful-relationships

Academically, it is better to find the original source and reference that.

If you do have to quote a secondary source:

• In the text you must cite the original author of the quote and the year the original quote was written as well as the source you read it in. If you do not know the year the original citation was written, omit the year.
• In the reference list you only list the source that you actually read.

Wembley (1997, as cited in Olsen, 1999) argues that impending fuel shortages ...

Wembley claimed that "fuel shortages are likely" (1997, as cited in Olsen, 1999, pp. 10-12).

Some have noted that fuel shortages are probable in the future (Wembley, 1997, as cited in Olsen, 1999).

Olsen, M. (1999).  My career.  Gallimard.

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APA Style: In-text citation

• References: Books
• References: Articles
• References: Other web content
• In-text citation

Every in-text citation must correspond with a full citation on the References page, and vice versa. You can't include a source in your references list if you don't also cite it in your paper.

Parenthetical Citations

Place at the end of a sentence, before the ending punctuation mark.

• One author: Falsely balanced news coverage can distort the public’s perception of expert consensus on an issue (Koehler, 2016).
• Two authors: Others have contended the opposite reaction was more likely (Salas & D'Agostino, 2020).
• Three or more authors: Discussion has been wide-ranging (Martin et al., 2020).
• Remember that APA does allow use of an office or a department as the author, so no-author citations should be rare.
• If there is truly no author, use the first two or three words of the title.
• The title of a chapter, article, or web page is in quotation marks in-text; the title of books or reports is in italics.

Narrative Citations

Narrative in-text citations incorporate citation elements into the text of the paper. The year can go in parentheses or also in the text.

• One author: Koehler in his 2016 study noted the possibility of...
• Two authors: Salas and D'Agustino (2020) contend that this effect...
• Three or more authors: Martin et al. (2020) discuss this theory...
• No author and/or no date: The article "Using Citations" (n.d.) discusses many reasons...

Citing the Same Author

If you are citing the same author in consecutive sentences, cite the source in the first sentence, and in the following sentences do not repeat the citation but instead make it clear in your writing that you are referring to the same source. In subsequent paragraphs, cite it again.   More detail on long paraphrases here .

Page Numbers

For short quotations of fewer than 40 words, add quotation marks around the words and incorporate the quote into your own text. Add the page number to the parenthetical citation.

You may also add a page number to make it easier for your reader to find the information, such as when citing within a book.

• Effective teams can be difficult to describe because “high performance along one domain does not translate to high performance along another” (Ervin et al., 2018, p. 470).
• Fry (2018) notes how computer algorithms often have been underestimated (p. 7). 

Block Quotes

For longer quotations of more than 40 words, format the quote in its own paragraph, with the entire section indented 1/2". Do not use quotation marks around it, and include the standard citation information at the end. 

For example, if you wished to quote the entire first paragraph of Alice's Adventures in Wonderland , that would be formatted as a block quote: 

Alice was beginning to get very tired of sitting by her sister on the bank, and of having nothing to do: once or twice she had peeped into the book her sister was reading, but it had no pictures or conversations in it, 'and what is the use of a book,' thought Alice, 'without pictures or conversations?' (Carroll 9)

Notice that the block quote has no punctuation mark after the parenthetical citation.

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APA In-Text Citations for Research Writing

Why Use In-Text Citations?

When writing a journal article, literature review, convention paper, or any other academic document, authors must include in-text citations whenever they refer to, summarize, paraphrase, or quote from another source. In addition, every time a work is cited within a paper (in APA style, a parenthetical citation), a corresponding entry must be included in the reference list.

How to Cite a Research Paper Using In-Text Citations

The rationale behind citing other people’s publications in your own manuscript is that you want to avoid intellectual dishonesty by giving credit to whoever reported a finding first or invented a specific technique. This is not only an ethical question, as being “sloppy” with your sources can easily be considered plagiarism (and even self-plagiarism , if you fail to refer to your own work), which can have legal consequences and damage your reputation.

General rules for what information should be provided when citing sources in a research paper vary across fields and depend on the type of source (e.g., books, journal articles, patents, conference proceedings, websites, etc.). We are not going into such differences here but will focus on the correct way of referencing other people’s research in your own paper according to one of the most common styles used to cite sources within the social sciences and in several other academic disciplines , that is, APA (American Psychological Association) style .

In research papers, in-text citations are most commonly used in the Introduction and Discussion Results sections. The following guidelines and examples are taken from the APA Publication Manual, 6th edition, 2nd printing , which details rules and application of APA style in research papers, including in-text citations, endnotes/footnotes, and references. For more information, consult the APA Style Manual website .

This resource provides detailed guidelines for citing sources in your paper and includes examples of in-text citations for reference by research authors. Before submitting your manuscript to a journal or publisher, be sure to use our free APA citation generator for your references and in-text citations.

APA Citation Rules: The Basics

Order and structure of in-text citation content.

When using APA format, follow the “author-date” method of in-text citation. Write the author’s last name and publication year for the source in parentheses and separate these pieces of information with a comma.

When referring to external work or referencing an entire work but not directly quoting the material, you only need to make a reference to the author and year of publication and not the page number in your citation.

The results of the first enzyme study (Chen et al., 2014) revealed several relationships.

If you mention the name of the author of the work in the sentence or earlier in the paragraph, you only need to include the year of publication in the citation.

Chen (2014) discusses several relationships revealed in this study.

Verb tense used in referring to other works

APA style requires authors to use past tense or present perfect tense (NOT present tense) when using signal phrases to refer to or discuss previous research (have a look at this article for more details on the correct tenses for different parts of a research paper ).

Radnitz (1995) found… / Radnitz (1995) has found…

Placement of in-text citations in the sentence (no quotation)

When referring to a specific work or works, place the citation (publication date only) directly after the author of the study referenced.

Klinge and Rogers (2010) found that mirroring is instrumental in developments of performative gender roles.

When giving information that reflects the results or implications of previous work, place the citation (author and publication date) at the end of the sentence.

Mirroring has been found to be instrumental in the development of performative gender roles (Klinge and Rogers, 2010).

Capitalization

Always capitalize author names and initials in in-text citations.

(r. kazinsky, 2014)    (R. Kazinsky, 2014)

In-Text Citation Rules for Short Quotations

When quoting directly from a work, include the author, publication year, and page number of the reference (preceded by “p.”).

Method 1 : Introduce the quotation with a signal phrase that includes the author’s last name; the publication year will follow in parentheses. Include the page number in parentheses at the end of the quoted text. Note that the quotation marks surround the text only, and not the parenthetical citation.

According to Khan (1976), “Graduate students tend to apply more diverse methods during their first two years of research” (p. 45). Khan (1976) noted that “graduate students tend to apply more diverse methods during their first two years of research” (p. 45), a fact that has profound implications for research departments.

Method 2 : If the author is absent in the signal phrase, include the author’s last name, the publication year, and the page number together in parentheses after the quoted text.

Researchers noted that “graduate students tend to apply more diverse methods during their first two years of research” (Khan, 1976, p. 45), but they did not offer a suggestion as to the cause.

In-text Citation Rules for Long Quotations

Long direct quotations are those with at least 40 words of quoted text in a row. Long quotes should be placed in a separate block of lines without quotation marks, similar to creating a new paragraph. Begin the quotation on a new line and indent 0.5in/1.27cm from the left margin. Type the entire quotation within these new margins using double-spacing. Include the parenthetical citation after the final punctuation mark.

Khan’s (1976) study found the following: Graduate students tend to apply more diverse methods during their first two years of research, especially when conducting research in teams of three or fewer with no senior researchers    present. This tendency could be attributed to either a misunderstanding of correct methodology or to a feeling of freedom to explore different approaches that the researchers have yet to employ. (p. 45)

Summarizing and Paraphrasing Other Works

When  paraphrasing another work , you only need to cite the author and year of publication in your in-text citation. It may be a good idea to include the page number as well if the paraphrased information is located on a specific page of the original text. APA guidelines encourage this inclusion but do not require it.

According to Khan (1976), new researchers tend to use more diverse methodologies. New researchers tend to use more diverse methodologies (Khan, 1976, p. 45).

Common Signal Phrases for Introducing External Works

• According to Johnson (publication year)…
• As Johnson (publication year) has noted…
• Johnson and Smith (publication year) contend that…
• As Johnson’s (2011) study revealed…

Citing Works by Multiple Authors/Editors

When making an in-text citation of works by multiple authors, there are specific rules to follow depending on the number of authors of a publication and the number of times you cite the same works.

Citing Multiple Works in One In-text Citation

When citing more than one source in the same in-text citation, list all sources in the standard way and separate them with a semi-colon. List the sources alphabetically (by author’s last name or by title if no author is given) in the order they appear in the reference list.

(Marsh, 1997; Johnson, 2002). (Kazinsky, 2017; “Three Different Roads,”  2013).

Citing Works by the Same Author with the Same Publication Year

When citing two or more sources with the same author and year of publication, assign lowercase letters directly after the year of publication (a, b, c) according to the alphabetical order of titles. You will use the same alphabetical designations in your in-text citations that you do in your reference list.

The incidence of West Nile virus in Florida increased between 2002 and 2004 (Dickens, 2014a). According to Dickens (2014b), “these viral infections were precipitated by record levels of rainfall around the peninsula” (p. 150).

Citing a Work Quoted in another Source

Work quoted or paraphrased in another text is called a “secondary source.” While in your reference list you must cite the primary source as well, in your in-text citation you will add the words “as cited in” followed by the secondary source. For example, if a review article by Franklin you are citing includes a useful quote by Adams that supports your paper, your in-text citation would look like this:

According to a study by Adams (as cited in Franklin, 2016), 25% of all US federal prisoners have been diagnosed with some form of social disorder. Adams (as cited in Franklin) contends that this statistic “reflects the dehumanizing conditions of most federal institutions” (p. 76).

Citing Web Pages

Entire website.

When citing an entire website (with no specific webpage or article given), simply provide the title and web address within the text of your paper. No citation is needed in the References.

The American Psychological Association includes detailed information on how to apply APA citation (http://www.apa.org).

Webpage with author(s)

A webpage with an individual author or authors should be cited in the same way as other texts, with the name or names written first, followed by the publication year.

There were 523 new cases reported in 2011 alone (Kristoff, 2012).

Webpage with a group author

Treat group authors as individual authors in in-text citations, but instead of the author’s last name, include the name of the group.

Claustrophobia afflicts one in five Britons (The Surrey Group, 2003).

Webpage with missing information

Even when some central information is missing from a website (e.g., no author, date, or webpage title), you may still cite it as a source if you use the correct formatting. For information on how to cite a website with missing information, visit the APA Style Blog post on  Missing Pieces .

Citing social media sources

For a more comprehensive explanation of social media citation guidelines, visit the APA Style Blog post on  How to Cite Social Media in APA Style .

And when submitting your finished AP document to journals or for a class assignment, be sure to get professional English editing services , including academic editing , manuscript editing , and research paper editing services . Professional editors with experience in APA, AMA, MLA, and other popular style guides will make sure that your document’s citations and references conform to the journal of your choice.

Wordvice Resources

Wordvice provides a variety of other articles on topics such as the number of references your manuscript should contain , different citation styles if your target style does not use APA, and how to paraphrase correctly when citing sources in your paper, as well as more general advice on how to write research papers on the Wordvice academic resources website .

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APA 7th Edition

• In-Text Citations
• Books/Book Chapters
• Social Media/Apps/Websites
• Video/TV/Podcasts
• Presentations/Dissertations
• Data/Unpublished Works
• Visual Works
• Legal Materials
• Biz Databases

This guide will provide information on how to cite your sources in-text and in your reference list using APA style & formatting. Click the tabs for an example of each. 

Publication Manual of the American Psychological Association

Examples of Reference Lists & In-text Citations

Additional resources:.

• Sample APA Papers from APA Style Download the Word Document and use the template for your APA papers.
• Sample Student Paper using APA from OWL Includes notes to explain the details. From APA Style. Use this sample paper as a guide for headings, in-text citations, references, & more.

The Purdue Online Writing Lab (OWL) APA Guide

• No Date : if there isn't a date, the reference starts with the author. 

Lucas, T. (n.d.). Mother nature revolts.  U.S. News & World

Report.   https://www.usnews.com/news/national-news/articles/2020-04-17/why-you-still-havent-gotten-your-coronavirus-stimulus-check

The in-text citation will look like this:

According to Lucas,  ... (n.d.).

It is hypothesized that Coronavirus was the planet's way of making a point (Lucas, n.d.).

• No Author : if there isn't an author, the reference starts with the title. 

Mother nature revolts. (2020, March 29). U.S. News & World

"Mother nature revolts" ... (2020).

It is hypothesized that Coronavirus was the planet's way of making a point ("Mother nature revolts", 2020).

• Exact quotes:  page numbers (or paragraph numbers) must be included for exact quotes: 

It was hypothesized that, "Coronavirus was the planet's way of making a point" (Lucas, 2017, p. 5.).

It was  hypothesized that, "Coronavirus w as the planet's way of making a point" (Lucas, 2017,  para . 5.).

• ​ ​ DOI = Digital Object Identifier.   If an item has a DOI, it must be included in the reference.  Not all articles and e-books will have a DOI.
• The research ... (Gonzalez & Perez., 2020).
• According to Perez, .... (2020).

If there are 2 authors, include both of them every time in the in-text citations.

• The research ... (Gonzalez et al., 2020).
• According to Gonzalez et al. .... (2020).
• Up to 20 Authors : names and initials for all 20 authors must be provided in the reference list. It will look like this:

The in-text citation will look like this: 

According to Smith et al. ... (2020). 

The research .... (Smith, et al., 2020).

• 21+ Authors : for sources with more than 20 authors, the first 19 are included in the reference list followed by an ellipses and the final author. It looks like this:

• Citing Multiple Works :  when referring to multiple works in-text, place the citations in alphabetical order, separating them with semicolons.

(Edwards, 2012; Flygare et al., 2019; Steba, 2015).

• Citing Multiple Works by the same author(s) in the same year:  when multiple references have identical author (or authors) and publication year, include a lowercase letter after the year. The year–letter combination is used in both the in-text citation and the reference list entry. Use only the year with a letter in the in-text citation, even if the reference list entry contains a more specific date.

Smith, J. & Ortiz, P. (2019a, February). Judge Judy and her impact on society.  Journal of Social Science, 15 (2), 16-25.

http://journsocscience.com

Smith, J. & Ortiz, P. (2019b, March). Judge Judy impacts social justice.  Journal of Social Science, 15 (2), 16-25.

Smith and Ortiz found ... (2019a).

...  (Smith & Ortiz, 2019b).

• Citing a Source within a Source :

Arpan, L. M., & Raney, A. A. (2003). An experimental investigation of news source and the hostile media effect. Journalism & Mass Communication Quarterly 80 (2), 265-281.

(Gunther, 1992, as cited in Arpan & Raney, 2003);

The in-text citation gives credit to the source used. This is the same one included in the reference list.

• Citing Personal Communication (for example via email or messenger):

Because readers cannot retrieve the communication, it is not included in the reference list.   The communication is cited in the text of the paper only.  

S. Fernandez (personal communication, April 15, 2020) ...

... (S. Fernandez, personal communication, April 15, 2020). 

• Organizational Authors with Common Acronyms

If an organization or government entity is commonly known by it's acronym, it can be used in-text but the full name should be spelled out in the reference list.  

The first in-text citation will look like this: 

The Centers for Medicare & Medicaid Services (CMS, 2020), described ... 

... (The Centers for Medicare & Medicaid Services [CMS], 2020).

In-text citations that follow can use the acronym:

According to CMS ... (2020).

... (CMS, 2020).

The reference list will always include the spelled out organization (and not the acronym):

The Centers for Medicare & Medicaid Servic e s. (2020).  ...

If you use Artificial Intelligence generated text such as ChatGPT, it needs to be cited.

However, before you get help from ai, check your syllabus and/or ask your professor whether it is allowed , example to model:.

When prompted “Why is toxic positivity a problem in the workplace,” the ChatGPT-generated text indicated that “toxic positivity can be harmful as it can lead to a dismissive attitude towards the concerns or struggles of employees” (OpenAI, 2023).

OpenAI. (2023).  ChatGPT  (Mar 23 version). [Large language model].  https://chat.openai.com/chat

• APA Style: How to cite ChatGPT We, the APA Style team, are not robots. We can all pass a CAPTCHA test, and we know our roles in a Turing test. And, like so many nonrobot human beings this year, we’ve spent a fair amount of time reading, learning, and thinking about issues related to large language models, artificial intelligence (AI), AI-generated text, and specifically ChatGPT. We’ve also been gathering opinions and feedback about the use and citation of ChatGPT. Thank you to everyone who has contributed and shared ideas, opinions, research, and feedback.

In-Text Citation Basics:

• APA uses author-date citation system
• Informs the reader where the information came from
• Refers the reader to the source information

• Use sparingly
• Page numbers (or paragraph numbers) must be included for exact quotes
• Only include relevant material
• Block quotes = 40+ words, no quotation marks, indented

Neu (2015) stated that “healthcare is a right” (p. 6).

In 2017, Smith argued that “healthcare is a privilege” (para. 3) and therefore should not be free.

The notion that healthcare is a right has been debated by many authors (Neu, 2105, p. 6; Smith, 2017, para. 3).

Blockquote:

Avoid Plagiarism

Indicate info. from various sources

Easily identify sources

Adds credibility to your writing

Expands breadth/depth of your writing

Acknowledge the sources that you have borrowed from

• The reference list starts on a new page with the word References , centered and bold

Double-spaced

Your reference list must match your in-text citations and vice versa

Alphabetical list by author’s last name

Use a hanging indent for every line after the first

For titles of books, articles, & websites in reference lists, capitalize only:

• the first word
• the first word after a colon
• proper nouns

In-Text Citation Examples:

General Reference Form :

Author Last Name(s), First Initial, Middle Initial. (Date). Title of article. Title of Source, volume number (issue number), page

numbers. DOI or URL.  

Reference Examples: 

Articles with a doi (digital object identifier):.

McConkey, S.M., & Christiansen, S.J. (2020). Language learning in Miami: A cross-linguistic model of diverse Spanish

dialects. Psychological Review , 128 (8), 25-61. http://dx.doi.org/10.1037/rev0000126

Articles without a DOI:

Andersen, J. (2020, March 30). Miami and Coronavirus. New York Times . C1

Pearsong, S., Padron, M., & Ortiz, J. (2020, January 1). What the New Year has in store for the U.S. The New

Yorker.  https://www.newyorker.com/culture/culture-desk/the-homemade-insight-of-fetch-the-bolt-cutters

Article with an article number or eLocator

​ Smith, T. C., Castillo, M. J., Jackson, G. L., Simpson, B. B., Lantry, R. S., O'Reilly, S. T., Rosenberg, F., Lee, L. H., Cox,

G.,  Harris, H. L., Kass, P., Gonzalez, W. L., Hughes, W., Carter, D., Campbell, C., Baker, A. B., Flores, T., Gray, W. E., 

Green, G., ... Nelson, T. P. (2020).  Miami and Coronavirus. PLOS ONE, 14 (1), Article

e0209899.  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0209899  

Reference Examples:

TIP: In the 7th edition, publisher location is no longer required when citing books.

Authored book with a DOI (Digital Object Identifier) Example:

Nadler, J.T. & Voyles, E. C. (2020).  Stereotypes: The incidence and impacts of bias.  ABC-CLIO.

http://dx.doi.org/10.3389 /fpsyg.2015.0004

Authored book without a DOI (print or ebook) Example:

Johnson, D.W. (2020). The customer revolution in healthcare: Delivering kinder, smarter, affordable care for all. McGraw-Hill.

Edited book without a DOI Example:

Hacker Hughes, J. (Ed). (2017). Military veteran psychological health and social care: Contemporary approaches. Routledge.

Chapter in an edited book with a DOI Example:

Stone, C. (2020). Stereotypes of veterans. In J. T. Nadler & Voyles, E. C. (Eds.), Stereotypes: The incidence and impacts of

bias . (pp. 213-225). ABC-CLIO. http://dx.doi.org/10.3389 /fpsyg.2015.0004.

Chapter in an edited book without a DOI Example:

Weinstock, R., Leong, G. B., & Silva, J. A. (2003). Defining forensic psychiatry: Roles and responsibilities. In R. Rosner (Ed.),

Principles and practice of forensic psychiatr y (2nd ed., pp. 7-13). CRC Press.

Website Examples:

Centers for Disease Control and Prevention. (2018, January 23). People at high risk of developing flu-related complications.

https://www.cdc.gov/flu/about/disease/high_risk.htm

Martin Lillie, C. M. (2016, December 29). Be kind to yourself: How self-compassion can improve your resiliency. Mayo Clinic.

https://www.mayoclinic.org/health-lifestyle/adult-health/in-depth/self-compassion-can-improve-your-resiliency/art-20267193

Boddy, J., Neumann, T., Jennings, S., Morron, V., Alderson, P., Rees, R., & Gibson, W. (n.d.). Ethics principles. The

Research Ethics Guidebook: A Resource for Social Scientists. http://www.ethicsguidebook.ac.uk/EthicsPrinciples

.... (Boddy, et al., n.d.).

... ( Centers for Disease Control and Prevention, 2018).

Body et al. ...  (n.d.) ...

According to the Centers for Disease Control and Prevention, ... (2018).

Tweet Example:

Obama, M. [@MichelleObama] (2020, April 18). Thank you to all the essential workers who are getting up every day and

risking their lives on our behalf. @LauraWBush and I were honored to show our support for their heroic efforts during

tonight's @GlblCtzn’s One World: #TogetherAtHome Special. [video attached] Tweet. Twitter

https://twitter.com/MichelleObama/status/1251695525017137159

.... (Obama, 2020).

Obama (2020) ...

Twitter Profile Example:

Bush, Laura. [@laurawbush]. (n.d.). Tweets . [Twitter profile] Twitter. Retrieved from April 18, 2020 from

https://twitter.com/laurawbush.

.... (Bush, n.d.).

Bush (n.d.) ...  

Facebook Page Example:

Coronavirus (Covid-19) Information Center. (n.d.). Home [Facebook page]. Facebook. Retrieved April 18, 2020, from

https://www.facebook.com/coronavirus_info/

.... ( Coronavirus  ( Covid-19 ) Information Center, n.d. ).

Coronavirus  ( Covid-19 ) Information Center (n.d.) ...

Facebook Post Example:

National institute of mental health. (2018, november 28). suicide affects all ages, genders, races, and ethnicities. check out, these 5 action steps for helping someone in emotional pain [infographic]. facebook. http://bit.ly/321qstq.

.... ( National Institute of Mental Health, 2018 ).

The National Institute of Mental Health ...   (2018) ...

Instagram Video or Photo Example: APA Style [@officialapastyle]. (2018, December 5). Welcome to the official Instagram for #APAStyle! We’re here to help you

With your apa style questions [instagram photograph]. retrieved from https://www.instagram.com/p/bq-a-dvblih/.

.... (APA Style, 2018).

APA Style ...  (2018) ...

Instagram Profile: Star Wars [@starwars]. (n.d.). Posts [Instagram profile]. Retrieved December 10, 2018, from

Https://www.instagram.com/starwars/.

.... (Star Wars, n.d.).

Star Wars ...  (n.d.) ...

Instagram Highlight: APA Style [@officialapastyle]. (n.d.). FAQs [Instagram highlight]. Retrieved December 10, 2018, from

Https://www.instagram.com/s/aglnagxpz2h0oje3otc2odkwntk5mtc5mty1/.

.... (APA Style, n.d.).

APA Style ...  (n.d.) ...

Blog Post Example:

APA Style. (2020, March 19). What’s new in the seventh edition  Publication  Manual.  APA Style.

https://apastyle.apa.org/blog/ whats-new-7e

.... (APA Style, 2020).

The APA Style (2020) ...

Mobile App Examples:

Actual app:.

https://itunes.apple.com/us/app/epocrates/id281935788?mt=8  

Entry in the App:

Epocrates. (2019). Interaction check: Aspirin + sertraline. In Epocrates medical references (version 18.12) [Mobile app]. App

Store. https://itunes.apple.com/us/app/epocrates/id281935788?mt=8

.... (Epocrates, 2019).

Epocrates ... (2019). 

YouTube Example:

Cutts, S. (2017, November 24). Happiness [Video]. YouTube. ​ https:youtube.com/24455202929

.... (Cutts, 2017).

Cutts (2017) ...

Ted Talk Example:

Kowalski, C. (2017, November). The critical role librarians play in the

opioid  crisis  https ://www.ted.com/talks/chera_kowalski_the_critical_role_librarians_play_in_the_opioid_crisis

.... (Kowalski, 2017).

Kowalski (2017) ...

Film or Video Example:

Forman, M. (Director). (1975). One flew over the cuckoo’s nest [Film]. United Artists.

.... (Forman, 1975).

Forman (1975) ...

TV Example:

Wolf, D. (1999-present). Law & Order: Special Victims Unit  [TV Series].  Wolf Entertainment Productions; NBC.

.... (Wolf , 1999-present ).

Wolf (1999-present) ...

Podcast Example:

Poor, N., Woods, E. & Williams, A. (2016-present). Ear Hustle [Audio podcast]. PRX.   https://www.earhustlesq.com/

.... (Poor et al., 2016-present).

Poor et al. (2016-present) ...

Report Examples:

National Cancer Institute. (2018). Facing forward: Life after cancer treatment (NIH Publication No. 18-2424). U.S. Department

of Health and Human Services, National Institutes of Health. https://www.cancer.gov/publications/patient-education/life-after-treatment.pdf

Blackwell, D. L., Lucas, J. W., & Clarke, T. C. (2014). Summary health statistics for U.S. adults: National Health Interview

Survey, 2012. Centers for Disease Control and Prevention. https://www.cdc.gov/nchs/data/series/sr_10/sr10_260.pdf

U.S. Securities and Exchange Commission. (2017). Agency financial report: Fiscal year 2017.

https://www.sec.gov/files/sec-2017-agency-financial-report.pdf

.... ( National Cancer Institute , 2018).

... (Blackwell, et al., 2014).

... ( U.S. Securities and Exchange Commission, 2017).

National Cancer Institute (2018) ...

Blackwell, et al. (2014) ...

According to the U.S. Securities and Exchange Commission (2017), ...

Presentation Example:

O'Reilly, P., Edwards, C., & Hamil, S. K. (2020, April 1-3).  How to cite properly in APA.  [Paper presentation]. Florida Library Association 100th Annual Conference, Orlando, FL, United States.

*Replace [Paper presentation] with [Conference presentation] or [Poster presentation] as needed. 

.... (O'Reilly, et al., 2020).

O'Reilly et al. (2020) ...

Dissertation Examples:

Unpublished:

Hodges, L. (2018). Instructional design perceptions and practices of faculty [Unpublished doctoral dissertation]. Florida

International University.

Sanderson, K. R. (2012). Time orientation in organizations: Polychronicity and multitasking (Publication No. 3554209)

[Doctoral dissertation Florida International University]. Proquest Dissertations & Theses.

.... (Hodges, 2018).

Sanderson (2012) ...

Unpublished Manuscript Example:

Yen, J., Chen, Y., Rigotti, A., & Deckard C. (2016). Linking good customer services to increased sales: An observational study

[Unpublished manuscript]. College of Business, Florida International University.

Include the department and institution where the work was published if possible. 

....  (Yen et al., 2016).

Yen, et al. (2016) ...

Data Set Examples:

Published Data:

Pew Research Center (2018).  Core Trend Survey  [Data set]. 

https ://www.pewresearch.org/internet/dataset/core-trends - survey/

Unpublished Unnamed Raw Data Set :

Baer,  R. A. (2015). [Unpublished raw data on the correlations between the Five Facet Mindfulness Questionnaire and the

Kentucky Inventory of Mindfulness Skills]. University of Kentucky.

.... (Pew Research Center, 2018).

Baer (2015) ...

Infographic Example:

Florida Library Association. (2020, February). Federal funds in Florida  [Infographic]. https://www.flalib.org/advocacy ​

.... (Florida Library Association [FLA], 2020).

Florida Library Association [FLA] (2020) ...

Map Example:

Florida International University GIS Center. (2015). BIKE – Bicycle Knowledge Explorer (Palm Beach)  [Map].

https://maps.fiu.edu/gis/research/projects/255/bike-%E2%80%93-bicycle-knowledge-explorer-palm-beach

.... ( Florida International  University  GIS Center , 2015).

Florida International  University  GIS Center  (2015) ...

Photograph Example:

McCurry, S. (1985). Afghan girl [Photograph]. National Geographic.

https://www.nationalgeographic.com/magazine/national-geographic-magazine-50-years-of-covers/#/ngm-1985-jun-714.jpg

.... (McCurry, 1985).

McCurry (1985) ...

PowerPoint or Lecture Notes Example:

Cana, E., & Vasilev, J. (2019, May 22). [Lecture notes on resource allocation]. Department of Management Control and

Information Systems, University of Chile. https://uchilefau.academia.edu/ElseZCanan

.... (Mack & Spake, 2018).

Cana and Vasiley (2019) ...

Museum Example:

Wood, G. (1930). American gothic [Painting]. Art Institute of Chicago, Chicago, IL, United States. https://www.artic.edu/aic/collections/artwork/6565

.... (Wood, 1930).

Wood (1930) ...

• APA 7th Edition Citation Guide for Business Resources This guide provides examples for citing business databases such as IBISWorld, Mergent Online, S&P, and other non-traditional article databases.

APA 7th Edition Videos & Tutorials

• References Part 1
• References Part 2

APA 7th Edition: Set up an APA Format Paper in 6 Minutes | Scribbr

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Literature Review: A Self-Guided Tutorial for NUR 288

• Literature Reviews: A Recap
• Peer-Review
• Reading the Literature
• Developing Research Questions
• 2. Review discipline styles
• Super Searching
• Finding the Full Text
• Citation Searching
• Evaluating online information
• When to stop searching
• How to cite your sources following APA
• In-Text Citations
• Keeping track of your references
• Annotating Articles Tip
• 5. Critically analyze and evaluate
• How to review the literature
• Using a synthesis matrix
• 7. Write literature review

APA In-Text Citations

• The symbol "&" is used inside parentheses; the word "and" is used in text..
• The author's last name and the year of publication should appear in any in-text citation.
• Direct quotes include the page number such as (Author, Year, Page Number)
• Be aware of how to cite a work with multiple authors, and how this format will change after the first citation.
• Quotations with in-text citations - example paragraph
• Paraphrasing with in-text citations -- example paragraph
• APA Style In-text Citations
• << Previous: How to cite your sources following APA
• Next: Keeping track of your references >>
• Last Updated: Jun 5, 2024 12:43 PM
• URL: https://libguides.wccnet.edu/literature_review

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• Knowledge Base

Methodology

• How to Write a Literature Review | Guide, Examples, & Templates

How to Write a Literature Review | Guide, Examples, & Templates

Published on January 2, 2023 by Shona McCombes . Revised on September 11, 2023.

What is a literature review? A literature review is a survey of scholarly sources on a specific topic. It provides an overview of current knowledge, allowing you to identify relevant theories, methods, and gaps in the existing research that you can later apply to your paper, thesis, or dissertation topic .

There are five key steps to writing a literature review:

• Search for relevant literature
• Evaluate sources
• Identify themes, debates, and gaps
• Outline the structure
• Write your literature review

A good literature review doesn’t just summarize sources—it analyzes, synthesizes , and critically evaluates to give a clear picture of the state of knowledge on the subject.

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Table of contents

What is the purpose of a literature review, examples of literature reviews, step 1 – search for relevant literature, step 2 – evaluate and select sources, step 3 – identify themes, debates, and gaps, step 4 – outline your literature review’s structure, step 5 – write your literature review, free lecture slides, other interesting articles, frequently asked questions, introduction.

• Quick Run-through
• Step 1 & 2

When you write a thesis , dissertation , or research paper , you will likely have to conduct a literature review to situate your research within existing knowledge. The literature review gives you a chance to:

• Demonstrate your familiarity with the topic and its scholarly context
• Develop a theoretical framework and methodology for your research
• Position your work in relation to other researchers and theorists
• Show how your research addresses a gap or contributes to a debate
• Evaluate the current state of research and demonstrate your knowledge of the scholarly debates around your topic.

Writing literature reviews is a particularly important skill if you want to apply for graduate school or pursue a career in research. We’ve written a step-by-step guide that you can follow below.

Prevent plagiarism. Run a free check.

Writing literature reviews can be quite challenging! A good starting point could be to look at some examples, depending on what kind of literature review you’d like to write.

• Example literature review #1: “Why Do People Migrate? A Review of the Theoretical Literature” ( Theoretical literature review about the development of economic migration theory from the 1950s to today.)
• Example literature review #2: “Literature review as a research methodology: An overview and guidelines” ( Methodological literature review about interdisciplinary knowledge acquisition and production.)
• Example literature review #3: “The Use of Technology in English Language Learning: A Literature Review” ( Thematic literature review about the effects of technology on language acquisition.)
• Example literature review #4: “Learners’ Listening Comprehension Difficulties in English Language Learning: A Literature Review” ( Chronological literature review about how the concept of listening skills has changed over time.)

You can also check out our templates with literature review examples and sample outlines at the links below.

Download Word doc Download Google doc

Before you begin searching for literature, you need a clearly defined topic .

If you are writing the literature review section of a dissertation or research paper, you will search for literature related to your research problem and questions .

Make a list of keywords

Start by creating a list of keywords related to your research question. Include each of the key concepts or variables you’re interested in, and list any synonyms and related terms. You can add to this list as you discover new keywords in the process of your literature search.

• Social media, Facebook, Instagram, Twitter, Snapchat, TikTok
• Body image, self-perception, self-esteem, mental health
• Generation Z, teenagers, adolescents, youth

Search for relevant sources

Use your keywords to begin searching for sources. Some useful databases to search for journals and articles include:

• Your university’s library catalogue
• Google Scholar
• Project Muse (humanities and social sciences)
• Medline (life sciences and biomedicine)
• EconLit (economics)
• Inspec (physics, engineering and computer science)

You can also use boolean operators to help narrow down your search.

Make sure to read the abstract to find out whether an article is relevant to your question. When you find a useful book or article, you can check the bibliography to find other relevant sources.

You likely won’t be able to read absolutely everything that has been written on your topic, so it will be necessary to evaluate which sources are most relevant to your research question.

For each publication, ask yourself:

• What question or problem is the author addressing?
• What are the key concepts and how are they defined?
• What are the key theories, models, and methods?
• Does the research use established frameworks or take an innovative approach?
• What are the results and conclusions of the study?
• How does the publication relate to other literature in the field? Does it confirm, add to, or challenge established knowledge?
• What are the strengths and weaknesses of the research?

Make sure the sources you use are credible , and make sure you read any landmark studies and major theories in your field of research.

You can use our template to summarize and evaluate sources you’re thinking about using. Click on either button below to download.

Take notes and cite your sources

As you read, you should also begin the writing process. Take notes that you can later incorporate into the text of your literature review.

It is important to keep track of your sources with citations to avoid plagiarism . It can be helpful to make an annotated bibliography , where you compile full citation information and write a paragraph of summary and analysis for each source. This helps you remember what you read and saves time later in the process.

To begin organizing your literature review’s argument and structure, be sure you understand the connections and relationships between the sources you’ve read. Based on your reading and notes, you can look for:

• Trends and patterns (in theory, method or results): do certain approaches become more or less popular over time?
• Themes: what questions or concepts recur across the literature?
• Debates, conflicts and contradictions: where do sources disagree?
• Pivotal publications: are there any influential theories or studies that changed the direction of the field?
• Gaps: what is missing from the literature? Are there weaknesses that need to be addressed?

This step will help you work out the structure of your literature review and (if applicable) show how your own research will contribute to existing knowledge.

• Most research has focused on young women.
• There is an increasing interest in the visual aspects of social media.
• But there is still a lack of robust research on highly visual platforms like Instagram and Snapchat—this is a gap that you could address in your own research.

There are various approaches to organizing the body of a literature review. Depending on the length of your literature review, you can combine several of these strategies (for example, your overall structure might be thematic, but each theme is discussed chronologically).

Chronological

The simplest approach is to trace the development of the topic over time. However, if you choose this strategy, be careful to avoid simply listing and summarizing sources in order.

Try to analyze patterns, turning points and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred.

If you have found some recurring central themes, you can organize your literature review into subsections that address different aspects of the topic.

For example, if you are reviewing literature about inequalities in migrant health outcomes, key themes might include healthcare policy, language barriers, cultural attitudes, legal status, and economic access.

Methodological

If you draw your sources from different disciplines or fields that use a variety of research methods , you might want to compare the results and conclusions that emerge from different approaches. For example:

• Look at what results have emerged in qualitative versus quantitative research
• Discuss how the topic has been approached by empirical versus theoretical scholarship
• Divide the literature into sociological, historical, and cultural sources

Theoretical

A literature review is often the foundation for a theoretical framework . You can use it to discuss various theories, models, and definitions of key concepts.

You might argue for the relevance of a specific theoretical approach, or combine various theoretical concepts to create a framework for your research.

Like any other academic text , your literature review should have an introduction , a main body, and a conclusion . What you include in each depends on the objective of your literature review.

The introduction should clearly establish the focus and purpose of the literature review.

Depending on the length of your literature review, you might want to divide the body into subsections. You can use a subheading for each theme, time period, or methodological approach.

As you write, you can follow these tips:

• Summarize and synthesize: give an overview of the main points of each source and combine them into a coherent whole
• Analyze and interpret: don’t just paraphrase other researchers — add your own interpretations where possible, discussing the significance of findings in relation to the literature as a whole
• Critically evaluate: mention the strengths and weaknesses of your sources
• Write in well-structured paragraphs: use transition words and topic sentences to draw connections, comparisons and contrasts

In the conclusion, you should summarize the key findings you have taken from the literature and emphasize their significance.

When you’ve finished writing and revising your literature review, don’t forget to proofread thoroughly before submitting. Not a language expert? Check out Scribbr’s professional proofreading services !

This article has been adapted into lecture slides that you can use to teach your students about writing a literature review.

Scribbr slides are free to use, customize, and distribute for educational purposes.

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If you want to know more about the research process , methodology , research bias , or statistics , make sure to check out some of our other articles with explanations and examples.

• Sampling methods
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• Likert scales
• Reproducibility

 Statistics

• Null hypothesis
• Statistical power
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• Effect size
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Research bias

• Optimism bias
• Cognitive bias
• Implicit bias
• Hawthorne effect
• Anchoring bias
• Explicit bias

A literature review is a survey of scholarly sources (such as books, journal articles, and theses) related to a specific topic or research question .

It is often written as part of a thesis, dissertation , or research paper , in order to situate your work in relation to existing knowledge.

There are several reasons to conduct a literature review at the beginning of a research project:

• To familiarize yourself with the current state of knowledge on your topic
• To ensure that you’re not just repeating what others have already done
• To identify gaps in knowledge and unresolved problems that your research can address
• To develop your theoretical framework and methodology
• To provide an overview of the key findings and debates on the topic

Writing the literature review shows your reader how your work relates to existing research and what new insights it will contribute.

The literature review usually comes near the beginning of your thesis or dissertation . After the introduction , it grounds your research in a scholarly field and leads directly to your theoretical framework or methodology .

A literature review is a survey of credible sources on a topic, often used in dissertations , theses, and research papers . Literature reviews give an overview of knowledge on a subject, helping you identify relevant theories and methods, as well as gaps in existing research. Literature reviews are set up similarly to other  academic texts , with an introduction , a main body, and a conclusion .

An  annotated bibliography is a list of  source references that has a short description (called an annotation ) for each of the sources. It is often assigned as part of the research process for a  paper .  

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What is a Literature Review?

The literature review is a written explanation by you, the author, of the research already done on the topic, question or issue at hand. What do we know (or not know) about this issue/topic/question?

• A literature review provides a thorough background of the topic by giving your reader a guided overview of major findings and current gaps in what is known so far about the topic. 
• The literature review is not a list (like an annotated bibliography) -- it is a narrative helping your reader understand the topic and where you will "stand" in the debate between scholars regarding the interpretation of meaning and understanding why things happen. Your literature review  helps your reader start to see the "camps" or "sides" within a debate, plus who studies the topic and their arguments. 
• A good literature review should help the reader sense how you will answer your research question and should highlight the preceding arguments and evidence you think are most helpful in moving the topic forward.
• The purpose of the literature review is to dive into the existing debates on the topic to learn about the various schools of thought and arguments, using your research question as an anchor. If you find something that doesn't help answer your question, you don't have to read (or include) it. That's the power of the question format: it helps you filter what to read and include in your literature review, and what to ignore.

How Do I Start?

Essentially you will need to:

• Identify and evaluate relevant literature (books, journal articles, etc.) on your topic/question.
• Figure out how to classify what you've gathered. You could do this by schools of thought, different answers to a question, the authors' disciplinary approaches, the research methods used, or many other ways.
• Use those groupings to craft a narrative, or story, about the relevant literature on this topic. 
• Remember to cite your sources properly! 
• Research: Getting Started Visit this guide to learn more about finding and evaluating resources.
• Literature Review: Synthesizing Multiple Sources (IUPUI Writing Center) An in-depth guide on organizing and synthesizing what you've read into a literature review.
• Guide to Using a Synthesis Matrix (NCSU Writing and Speaking Tutorial Service) Overview of using a tool called a Synthesis Matrix to organize your literature review.
• Synthesis Matrix Template (VCU Libraries) A word document from VCU Libraries that will help you create your own Synthesis Matrix.

Literature Reviews: Overview

This video from NCSU Libraries gives a helpful overview of literature reviews. Even though it says it's "for graduate students," the principles are the same for undergraduate students too!

Literature Review Examples

Reading a Scholarly Article

• Reading a Scholarly Article or Literature Review Highlights sections of a scholarly article to identify structure of a literature review.
• Anatomy of a Scholarly Article (NCSU Libraries) Interactive tutorial that describes parts of a scholarly article typical of a Sciences or Social Sciences research article.
• Evaluating Information | Reading a Scholarly Article (Brown University Library) Provides examples and tips across disciplines for reading academic articles.
• Reading Academic Articles for Research [LIBRE Project] Gabriel Winer & Elizabeth Wadell (ASCCC Open Educational Resources Initiative (OERI))

Additional Tutorials and Resources

• UR Writer's Web: Using Sources Guidance from the UR Writing Center on how to effectively use sources in your writing (which is what you're doing in your literature review!).
• Write a Literature Review (VCU Libraries) "Lit Reviews 101" with links to helpful tools and resources, including powerpoint slides from a literature review workshop.
• Literature Reviews (UNC Writing Center) Overview of the literature review process, including examples of different ways to organize a lit review.
• “Ten Simple Rules for Writing a Literature Review.” Pautasso, Marco. “Ten Simple Rules for Writing a Literature Review.” PLOS Computational Biology, vol. 9, no. 7, July 2013, p. e1003149.
• Writing the Literature Review Part I (University of Maryland University College) Video that explains more about what a literature review is and is not. Run time: 5:21.
• Writing the Literature Review Part II (University of Maryland University College) Video about organizing your sources and the writing process. Run time: 7:40.
• Writing a Literature Review (OWL @ Purdue)
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Harvard Guide to Using Sources 

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• When neither the author nor the page number is mentioned in the body of the sentence, you should include both the author’s last name and the page number in the parenthetical citation.

Colleges and universities need to create policies that foster inclusion for low-income students (Jack 24).

• When the author’s name is mentioned in the sentence, you should include only the page number in your parenthetical citation.

As Anthony Jack argues, colleges and universities need to create policies that foster inclusion for low-income students (24).

• If the source you are writing about does not have page numbers, or if you consulted an e-book version of the source, you should include only the author’s name in the parenthetical citation:

Colleges and universities need to create policies that foster inclusion for low-income students (Jack).

• If you mention the author in the body of the sentence and there is no page number in the source, you should not include a parenthetical citation.

As Anthony Jack argues, colleges and universities need to create policies that foster inclusion for low-income students.

• If you are referring to an entire work rather than a specific page, you do not need to include a page number.

In The Privileged Poor, Anthony Jack describes many obstacles that low-income students face at selective colleges and universities.

• If you are referring to a source that has no listed author, you should include the title (or a shortened version of the title) in your parenthetical citation.

Harvard College promises “to educate the citizens and citizen-leaders for our society” (“Mission, Vision, & History”).

• If you are referring to a source that has two authors, you should include both authors in your parenthetical citation.

The researchers tested whether an intervention during the first year of college could improve student well-being (Walton and Cohen 1448).

• If you refer to a source that has more than two authors, you should include the first author’s name followed by et al. ( Et al. is an abbreviation for et alia which means “and others” in Latin.) When you use et al. in a citation, you should not put it in italics.

The researchers studied more than 12,000 students who were interested in STEM fields (LaCosse et al. 8).

• If you refer to more than one source by the same author in your paper, you should include the title (or a shortened version of the title) in your parenthetical citation so that readers will know which source to look for in your Works Cited list. If you mention the author’s name in the sentence, you only need to include the title and page number. If you mention the author and title in the sentence, you only need to include the page number.

Colleges and universities need to create policies that foster inclusion for low-income students (Jack, Privileged Poor 24).

According to Anthony Jack, colleges and universities need to create policies that foster inclusion for low-income students ( Privileged Poor 24).

As Anthony Jack writes in Privileged Poor, colleges and universities need to create policies that foster inclusion for low-income students (24).

• If you want to credit multiple authors for making the same point, you can include them all in one parenthetical citation. 

Students who possess cultural capital, measured by proxies like involvement in literature, art, and classical music, tend to perform better in school (Bourdieu and Passeron; Dumais; Orr).

• If you refer to a source that includes line numbers in the margins, numbered paragraphs, numbered chapters, or numbered sections rather than page numbers, you should include the number in your parenthetical citation, along with “line,” “ch./ chs.,” or “sec./secs.”   You can include stable numbering like chapters even when there are no stable page numbers (as in an e-book). You should separate “line” or other designation from the work’s title or author’s name with a comma.  If the source does not include this type of numbering, you should not include it either.

We learn that when he went to the store to buy clothes for his son, “a frantic inspection of the boys’ department revealed no suits to fit the new-born Button” (Fitzgerald, ch.2).

• If you are citing a play, you should include the act and scene along with line numbers (for verse) or page numbers, followed by act and scene, (for prose).

Guildenstern tells Hamlet that “there has been much throwing about of brains” (Shakespeare, 2.2. 381-382).

Chris is in this mindset when he says, “a couple minutes, and your whole life changes, that’s it. It’s gone” (Nottage, 13; act 1, scene1).

• If you are referring to a video or audio recording that contains time stamps, you should include the time in your parenthetical citation to make it easy for your readers to find the part of the recording that you are citing.

In the Stranger Things official trailer, the audience knows that something unusual is going to happen from the moment the boys get on their bicycles to ride off into the night (0:16).

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• Works Cited Format
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• Frequently Asked Questions about Citing Sources in MLA Format
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PDFs for This Section

• Citing Sources
• Online Library and Citation Tools

How to Write a Literature Review - A Self-Guided Tutorial

• Literature Reviews: A Recap
• Reading Journal Articles
• Does it describe a Literature Review?
• 1. Identify the question
• 2. Review discipline styles
• Searching article databases - video
• Finding the article full-text
• Citation trails
• When to stop searching
• Citation Managers
• 5. Critically analyze and evaluate
• 6. Synthesize
• 7. Write literature review
• Additional Resources

All about citation trails

Welcome! Here we'll discuss citation trails: what they are, how to locate them, and how to use them to improve your research. Sometimes the act of following a citation trail is called "citation chaining" or "citation mining."

After reading this guide and doing the included activity, you should:

• Define what a citation trail is,
• Distinguish between forward and backward citation trails are, and
• Use citation trails to find additional resources for your research.

What is a citation trail?

A citation trail is a link from an article or book to a second article or book, connected in some way to the first article. If you find an article that is important or relevant to your work, you should follow the citation trails to find similarly important or relevant articles .  

The number of citations an article gets may indicate the relative importance of that article in the field or discipline. Generally, the higher the list of citations, the more that article has been used as a resource for subsequent research, which would suggest that the article's research and conclusions are sound. However, if an article is very recently published (within the last two or three years), it may not have many citations regardless of its value. 

Using Citation Trails to Find MORE Resources (UCML Video Tutorial)

Use an article's citations trails to find more information related to your research. This video will show you how to locate an article's citation trails in Web of Science, Google Scholar, and UC Library Search. (3 min.)

Learn more at the research guide linked below:

• Using Citation Trails to Identify Article Networks by Olivia Olivares Last Updated Aug 15, 2024 447 views this year
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• Next: When to stop searching >>
• Last Updated: Aug 16, 2024 10:53 AM
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• Harvard In-Text Citation | A Complete Guide & Examples

Harvard In-Text Citation | A Complete Guide & Examples

Published on 30 April 2020 by Jack Caulfield . Revised on 5 May 2022.

An in-text citation should appear wherever you quote or paraphrase a source in your writing, pointing your reader to the full reference .

In Harvard style , citations appear in brackets in the text. An in-text citation consists of the last name of the author,  the year of publication, and a page number if relevant.

Up to three authors are included in Harvard in-text citations. If there are four or more authors, the citation is shortened with et al .

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Table of contents

Including page numbers in citations, where to place harvard in-text citations, citing sources with missing information, frequently asked questions about harvard in-text citations.

When you quote directly from a source or paraphrase a specific passage, your in-text citation must include a page number to specify where the relevant passage is located.

Use ‘p.’ for a single page and ‘pp.’ for a page range:

• Meanwhile, another commentator asserts that the economy is ‘on the downturn’ (Singh, 2015, p. 13 ).
• Wilson (2015, pp. 12–14 ) makes an argument for the efficacy of the technique.

If you are summarising the general argument of a source or paraphrasing ideas that recur throughout the text, no page number is needed.

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When incorporating citations into your text, you can either name the author directly in the text or only include the author’s name in brackets.

Naming the author in the text

When you name the author in the sentence itself, the year and (if relevant) page number are typically given in brackets straight after the name:

Naming the author directly in your sentence is the best approach when you want to critique or comment on the source.

Naming the author in brackets

When you  you haven’t mentioned the author’s name in your sentence, include it inside the brackets. The citation is generally placed after the relevant quote or paraphrase, or at the end of the sentence, before the full stop:

Multiple citations can be included in one place, listed in order of publication year and separated by semicolons:

This type of citation is useful when you want to support a claim or summarise the overall findings of sources.

Common mistakes with in-text citations

In-text citations in brackets should not appear as the subject of your sentences. Anything that’s essential to the meaning of a sentence should be written outside the brackets:

• (Smith, 2019) argues that…
• Smith (2019) argues that…

Similarly, don’t repeat the author’s name in the bracketed citation and in the sentence itself:

• As Caulfield (Caulfield, 2020) writes…
• As Caulfield (2020) writes…

Sometimes you won’t have access to all the source information you need for an in-text citation. Here’s what to do if you’re missing the publication date, author’s name, or page numbers for a source.

If a source doesn’t list a clear publication date, as is sometimes the case with online sources or historical documents, replace the date with the words ‘no date’:

When it’s not clear who the author of a source is, you’ll sometimes be able to substitute a corporate author – the group or organisation responsible for the publication:

When there’s no corporate author to cite, you can use the title of the source in place of the author’s name:

No page numbers

If you quote from a source without page numbers, such as a website, you can just omit this information if it’s a short text – it should be easy enough to find the quote without it.

If you quote from a longer source without page numbers, it’s best to find an alternate location marker, such as a paragraph number or subheading, and include that:

A Harvard in-text citation should appear in brackets every time you quote, paraphrase, or refer to information from a source.

The citation can appear immediately after the quotation or paraphrase, or at the end of the sentence. If you’re quoting, place the citation outside of the quotation marks but before any other punctuation like a comma or full stop.

In Harvard referencing, up to three author names are included in an in-text citation or reference list entry. When there are four or more authors, include only the first, followed by ‘ et al. ’

In Harvard style , when you quote directly from a source that includes page numbers, your in-text citation must include a page number. For example: (Smith, 2014, p. 33).

You can also include page numbers to point the reader towards a passage that you paraphrased . If you refer to the general ideas or findings of the source as a whole, you don’t need to include a page number.

When you want to use a quote but can’t access the original source, you can cite it indirectly. In the in-text citation , first mention the source you want to refer to, and then the source in which you found it. For example:

It’s advisable to avoid indirect citations wherever possible, because they suggest you don’t have full knowledge of the sources you’re citing. Only use an indirect citation if you can’t reasonably gain access to the original source.

In Harvard style referencing , to distinguish between two sources by the same author that were published in the same year, you add a different letter after the year for each source:

• (Smith, 2019a)
• (Smith, 2019b)

Add ‘a’ to the first one you cite, ‘b’ to the second, and so on. Do the same in your bibliography or reference list .

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Literature Cited Section

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This is the last section of the paper. Here you should provide an alphabetical listing of all the published work you cited in the text of the paper. This does not mean every article you found in your research; only include the works you actually cited in the text of your paper. A standard format is used both to cite literature in the text and to list these studies in the Literature Cited section.  Hypothetical examples of the format used in the journal Ecology are below:     Djorjevic, M., D.W. Gabriel and B.G. Rolfe. 1987. Rhizobium: Refined parasite of legumes. Annual Review of Phytopathology 25: 145-168.     Jones, I. J. and B. J. Green. 1963. Inhibitory agents in walnut trees. Plant Physiology 70:101-152.     MacArthur, R.H. and E.O. Wilson. 1967. The Theory of Island Biogeography. Princeton University Press, Princeton, N.J.     Smith, E. A. 1949. Allelopathy in walnuts. American Journal of Botany 35:1066-1071. Here is a dissection of the first entry, in the format for Ecology :       Firstauthor, M., D.W. Secondauthor and B.G. Thirdauthor. Year. Article title with only the first letter capitalized. Journal Article Title with Important Words in Caps  volume#(issue# if there is one): firstpage-lastpage. Notice some of the following details:       - the list is alphabetized;     - no first or middle names are listed (the author's first and middle initials are used instead);     - only the first word in the title of the journal article (except for proper nouns) is capitalized;     - different journals use different styles for Literature Cited sections.   You should pay careful attention to details of formatting when you write your own Literature Cited section. For papers published in journals you must provide the date, title, journal name, volume number, and page numbers. For books you need the publication date, title, publisher, and place of publication.

• Bates College Guide to Citing Sources
• American Psychological Association (APA) style A guide to formatting papers using APA from Purdue University.
• APA 2007 Revision of Citation Styles An online revision of the information presented in the fifth edition of the Publication Manual of the American Psychological Association . more... less... This guide serves a resource for citation styles and uniform means of referencing authoritative works.
• APA Documentation (University of Wisconsin-Madison) A quick resource for citing references in papers using the 5th edition of the Publication Manual of the American Psychological Association (2001). Provided by The Writing Center at the University of Wisconsin-Madison.
• American Anthropological Association Style Manual Prepared for and preferred by the American Anthropological Association (AAA) using the Chicago Manual of Style. Citation examples listed from pages 10-14. Also recommend consulting the Chicago Manual of Style Online.

• Elements of Style This classic work by William Strunk is intended for use in which the practice of composition is combined with the study of literature. It gives the main requirements of plain English style and concentrates on the rules of usage most often abused.
• IEEE Editorial Style Manual This link will take you to a downloadable version of the IEEE Editorial Style Manual.
• Modern Language Association (MLA) style
• Purdue OWL (Online Writing Lab) Easy-to-use site that provides information and examples for using the American Psychological Association (APA) citation and format style and the Modern Language Association (MLA) citation and format style. Also included information about the Chicago Manual of Style (16th ed.)
• Include citations that provide sufficient context to allow for critical analysis of this
• work by others.
• Include citations that give the reader sources of background and related material so
• that the current work can be understood by the target audience.
• Include citations that provide examples of alternate ideas, data, or conclusions to
• compare and contrast with this work, if they exist. Do not exclude contrary evidence.
• Include citations that acknowledge and give credit to sources relied upon for this
• Are the citations up to date, referencing that latest work on this topic?
• It is the job of the authors to verify the accuracy of the references.
• Avoid: spurious citations (citations that are not needed but are included anyway);

biased citations (references added or omitted for reasons other than meeting the above goals of citations); excessive self-cites (citations to one’s own work). 

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Ieee quick citation guide.

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Using In-text Citation

Include an in-text citation when you refer to, summarize, paraphrase, or quote from another source. For every in-text citation in your paper, there must be a corresponding entry in your reference list.

IEEE in-text citation style does not include author's name, pages used, or date of publication. Instead, refer to the citation with a number within square brackets, e.g. [13]. The number within the square brackets will correspond to the complete citation in your reference list.

Example paragraph with in-text citations

Engineering and scientific standards affect our daily lives in a variety of ways including the transportation that we use, the traffic lights on our roads, and the fire hydrants used in our towns [1], [2].

Reference List

[1] C. Leachman, "Introduction to Standards," in Teaching and Collecting Technical Standards: A Handbook for Librarians and Educators , C. Leachman, E. M. Rowley, M. Phillips, and D. Soloman, Eds., West Lafayette, Indiana, USA: Purde Univ. Press, 2023, pp. 3-13.

[2] R. Glie, Speaking with Standards . Boston, MA, USA: Cahners Books, 1972.

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Reconstructive surgery of the head and neck in organ transplant recipients: a case report and a review of the literature.

1. Introduction

2. case presentation, 3. discussion, 3.1. epidemiology and etiology of cancers in sotrs, 3.2. surgical approach, 3.3. immunosuppressant therapy and wound healing, 3.4. wound healing management in sotrs: a pragmatic approach, 4. conclusions and future perspectives, author contributions, informed consent statement, data availability statement, conflicts of interest.

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Share and Cite

Rampi, A.; Comini, L.V.; Galli, A.; Howardson, B.O.; Tettamanti, A.; Luparello, P.; Redaelli, G.; Di Santo, D.; Bondi, S. Reconstructive Surgery of the Head and Neck in Organ Transplant Recipients: A Case Report and a Review of the Literature. J. Clin. Med. 2024 , 13 , 4790. https://doi.org/10.3390/jcm13164790

Rampi A, Comini LV, Galli A, Howardson BO, Tettamanti A, Luparello P, Redaelli G, Di Santo D, Bondi S. Reconstructive Surgery of the Head and Neck in Organ Transplant Recipients: A Case Report and a Review of the Literature. Journal of Clinical Medicine . 2024; 13(16):4790. https://doi.org/10.3390/jcm13164790

Rampi, Andrea, Lara Valentina Comini, Andrea Galli, Bright Oworae Howardson, Alberto Tettamanti, Paolo Luparello, Gabriele Redaelli, Davide Di Santo, and Stefano Bondi. 2024. "Reconstructive Surgery of the Head and Neck in Organ Transplant Recipients: A Case Report and a Review of the Literature" Journal of Clinical Medicine 13, no. 16: 4790. https://doi.org/10.3390/jcm13164790

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Purdue Online Writing Lab Purdue OWL® College of Liberal Arts

In-Text Citations: The Basics

Welcome to the Purdue OWL

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Copyright ©1995-2018 by The Writing Lab & The OWL at Purdue and Purdue University. All rights reserved. This material may not be published, reproduced, broadcast, rewritten, or redistributed without permission. Use of this site constitutes acceptance of our terms and conditions of fair use.

Note:  This page reflects APA 6, which is now out of date. It will remain online until 2021, but will not be updated. The equivalent APA 7 page can be found here .

Reference citations in text are covered on pages 169-179 of the Publication Manual. What follows are some general guidelines for referring to the works of others in your essay.

Note:  On pages 65-66, the Publication Manual suggests that authors of research papers should use the past tense or present perfect tense for signal phrases that occur in the literature review and procedure descriptions (for example, Jones (1998) found or Jones (1998) has found ...). Contexts other than traditionally-structured research writing may permit the simple present tense (for example, Jones (1998)  finds ).

APA citation basics

When using APA format, follow the author-date method of in-text citation. This means that the author's last name and the year of publication for the source should appear in the text, for example, (Jones, 1998), and a complete reference should appear in the reference list at the end of the paper.

If you are referring to an idea from another work but NOT directly quoting the material, or making reference to an entire book, article or other work, you only have to make reference to the author and year of publication and not the page number in your in-text reference. All sources that are cited in the text must appear in the reference list at the end of the paper.

In-text citation capitalization, quotes, and italics/underlining

• Always capitalize proper nouns, including author names and initials: D. Jones.

( Note: in your References list, only the first word of a title will be capitalized: Writing new media .)

• When capitalizing titles, capitalize both words in a hyphenated compound word: Natural-Born Cyborgs .
• Capitalize the first word after a dash or colon: "Defining Film Rhetoric: The Case of Hitchcock's Vertigo ."
• Italicize the titles of longer works such as books, edited collections, movies, television series, documentaries, or albums: The Closing of the American Mind ; The Wizard of Oz ; Friends .
• Put quotation marks around the titles of shorter works such as journal articles, articles from edited collections, television series episodes, and song titles: "Multimedia Narration: Constructing Possible Worlds;" "The One Where Chandler Can't Cry."

Short quotations

If you are directly quoting from a work, you will need to include the author, year of publication, and page number for the reference (preceded by "p."). Introduce the quotation with a signal phrase that includes the author's last name followed by the date of publication in parentheses.

According to Jones (1998), "Students often had difficulty using APA style, especially when it was their first time" (p. 199).

Jones (1998) found "students often had difficulty using APA style" (p. 199); what implications does this have for teachers?

If the author is not named in a signal phrase, place the author's last name, the year of publication, and the page number in parentheses after the quotation.

She stated, "Students often had difficulty using APA style" (Jones, 1998, p. 199), but she did not offer an explanation as to why.

Long quotations

Place direct quotations that are 40 words or longer in a free-standing block of typewritten lines and omit quotation marks. Start the quotation on a new line, indented 1/2 inch from the left margin, i.e., in the same place you would begin a new paragraph. Type the entire quotation on the new margin, and indent the first line of any subsequent paragraph within the quotation 1/2 inch from the new margin. Maintain double-spacing throughout. The parenthetical citation should come after the closing punctuation mark.

Students often had difficulty using APA style, especially when it was their first time citing sources. This difficulty could be attributed to the fact that many students failed to purchase a style manual or to ask their teacher for help. (p. 199)

Summary or paraphrase

If you are paraphrasing an idea from another work, you only have to make reference to the author and year of publication in your in-text reference, but APA guidelines encourage you to also provide the page number (although it is not required).

According to Jones (1998), APA style is a difficult citation format for first-time learners.

APA style is a difficult citation format for first-time learners (Jones, 1998, p. 199).

How to cite ChatGPT

Use discount code STYLEBLOG15 for 15% off APA Style print products with free shipping in the United States.

We, the APA Style team, are not robots. We can all pass a CAPTCHA test , and we know our roles in a Turing test . And, like so many nonrobot human beings this year, we’ve spent a fair amount of time reading, learning, and thinking about issues related to large language models, artificial intelligence (AI), AI-generated text, and specifically ChatGPT . We’ve also been gathering opinions and feedback about the use and citation of ChatGPT. Thank you to everyone who has contributed and shared ideas, opinions, research, and feedback.

In this post, I discuss situations where students and researchers use ChatGPT to create text and to facilitate their research, not to write the full text of their paper or manuscript. We know instructors have differing opinions about how or even whether students should use ChatGPT, and we’ll be continuing to collect feedback about instructor and student questions. As always, defer to instructor guidelines when writing student papers. For more about guidelines and policies about student and author use of ChatGPT, see the last section of this post.

Quoting or reproducing the text created by ChatGPT in your paper

If you’ve used ChatGPT or other AI tools in your research, describe how you used the tool in your Method section or in a comparable section of your paper. For literature reviews or other types of essays or response or reaction papers, you might describe how you used the tool in your introduction. In your text, provide the prompt you used and then any portion of the relevant text that was generated in response.

Unfortunately, the results of a ChatGPT “chat” are not retrievable by other readers, and although nonretrievable data or quotations in APA Style papers are usually cited as personal communications , with ChatGPT-generated text there is no person communicating. Quoting ChatGPT’s text from a chat session is therefore more like sharing an algorithm’s output; thus, credit the author of the algorithm with a reference list entry and the corresponding in-text citation.

When prompted with “Is the left brain right brain divide real or a metaphor?” the ChatGPT-generated text indicated that although the two brain hemispheres are somewhat specialized, “the notation that people can be characterized as ‘left-brained’ or ‘right-brained’ is considered to be an oversimplification and a popular myth” (OpenAI, 2023).

OpenAI. (2023). ChatGPT (Mar 14 version) [Large language model]. https://chat.openai.com/chat

You may also put the full text of long responses from ChatGPT in an appendix of your paper or in online supplemental materials, so readers have access to the exact text that was generated. It is particularly important to document the exact text created because ChatGPT will generate a unique response in each chat session, even if given the same prompt. If you create appendices or supplemental materials, remember that each should be called out at least once in the body of your APA Style paper.

When given a follow-up prompt of “What is a more accurate representation?” the ChatGPT-generated text indicated that “different brain regions work together to support various cognitive processes” and “the functional specialization of different regions can change in response to experience and environmental factors” (OpenAI, 2023; see Appendix A for the full transcript).

Creating a reference to ChatGPT or other AI models and software

The in-text citations and references above are adapted from the reference template for software in Section 10.10 of the Publication Manual (American Psychological Association, 2020, Chapter 10). Although here we focus on ChatGPT, because these guidelines are based on the software template, they can be adapted to note the use of other large language models (e.g., Bard), algorithms, and similar software.

The reference and in-text citations for ChatGPT are formatted as follows:

• Parenthetical citation: (OpenAI, 2023)
• Narrative citation: OpenAI (2023)

Let’s break that reference down and look at the four elements (author, date, title, and source):

Author: The author of the model is OpenAI.

Date: The date is the year of the version you used. Following the template in Section 10.10, you need to include only the year, not the exact date. The version number provides the specific date information a reader might need.

Title: The name of the model is “ChatGPT,” so that serves as the title and is italicized in your reference, as shown in the template. Although OpenAI labels unique iterations (i.e., ChatGPT-3, ChatGPT-4), they are using “ChatGPT” as the general name of the model, with updates identified with version numbers.

The version number is included after the title in parentheses. The format for the version number in ChatGPT references includes the date because that is how OpenAI is labeling the versions. Different large language models or software might use different version numbering; use the version number in the format the author or publisher provides, which may be a numbering system (e.g., Version 2.0) or other methods.

Bracketed text is used in references for additional descriptions when they are needed to help a reader understand what’s being cited. References for a number of common sources, such as journal articles and books, do not include bracketed descriptions, but things outside of the typical peer-reviewed system often do. In the case of a reference for ChatGPT, provide the descriptor “Large language model” in square brackets. OpenAI describes ChatGPT-4 as a “large multimodal model,” so that description may be provided instead if you are using ChatGPT-4. Later versions and software or models from other companies may need different descriptions, based on how the publishers describe the model. The goal of the bracketed text is to briefly describe the kind of model to your reader.

Source: When the publisher name and the author name are the same, do not repeat the publisher name in the source element of the reference, and move directly to the URL. This is the case for ChatGPT. The URL for ChatGPT is https://chat.openai.com/chat . For other models or products for which you may create a reference, use the URL that links as directly as possible to the source (i.e., the page where you can access the model, not the publisher’s homepage).

Other questions about citing ChatGPT

You may have noticed the confidence with which ChatGPT described the ideas of brain lateralization and how the brain operates, without citing any sources. I asked for a list of sources to support those claims and ChatGPT provided five references—four of which I was able to find online. The fifth does not seem to be a real article; the digital object identifier given for that reference belongs to a different article, and I was not able to find any article with the authors, date, title, and source details that ChatGPT provided. Authors using ChatGPT or similar AI tools for research should consider making this scrutiny of the primary sources a standard process. If the sources are real, accurate, and relevant, it may be better to read those original sources to learn from that research and paraphrase or quote from those articles, as applicable, than to use the model’s interpretation of them.

We’ve also received a number of other questions about ChatGPT. Should students be allowed to use it? What guidelines should instructors create for students using AI? Does using AI-generated text constitute plagiarism? Should authors who use ChatGPT credit ChatGPT or OpenAI in their byline? What are the copyright implications ?

On these questions, researchers, editors, instructors, and others are actively debating and creating parameters and guidelines. Many of you have sent us feedback, and we encourage you to continue to do so in the comments below. We will also study the policies and procedures being established by instructors, publishers, and academic institutions, with a goal of creating guidelines that reflect the many real-world applications of AI-generated text.

For questions about manuscript byline credit, plagiarism, and related ChatGPT and AI topics, the APA Style team is seeking the recommendations of APA Journals editors. APA Style guidelines based on those recommendations will be posted on this blog and on the APA Style site later this year.

Update: APA Journals has published policies on the use of generative AI in scholarly materials .

We, the APA Style team humans, appreciate your patience as we navigate these unique challenges and new ways of thinking about how authors, researchers, and students learn, write, and work with new technologies.

American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.). https://doi.org/10.1037/0000165-000

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