In-Text Citations: Author/Authors
APA (American Psychological Association) style is most commonly used to cite sources within the social sciences. This resource, revised according to the 6th edition, second printing of the APA manual, offers examples for the general format of APA research papers, in-text citations, endnotes/footnotes, and the reference page. For more information, please consult the Publication Manual of the American Psychological Association, (6th ed., 2nd printing).
Contributors: Joshua M. Paiz, Elizabeth Angeli, Jodi Wagner, Elena Lawrick, Kristen Moore, Michael Anderson, Lars Soderlund, Allen Brizee, Russell Keck
Last Edited: 2018-02-21 02:51:57
APA style has a series of important rules on using author names as part of the author-date system. There are additional rules for citing indirect sources, electronic sources, and sources without page numbers.
Citing an Author or Authors
A Work by Two Authors: Name both authors in the signal phrase or in parentheses each time you cite the work. Use the word "and" between the authors' names within the text and use the ampersand in parentheses.
Research by Wegener and Petty (1994) supports...
(Wegener & Petty, 1994)
A Work by Three to Five Authors: List all the authors in the signal phrase or in parentheses the first time you cite the source. Use the word "and" between the authors' names within the text and use the ampersand in parentheses.
(Kernis, Cornell, Sun, Berry, & Harlow, 1993)
In subsequent citations, only use the first author's last name followed by "et al." in the signal phrase or in parentheses.
(Kernis et al., 1993)
In et al., et should not be followed by a period.
Six or More Authors: Use the first author's name followed by et al. in the signal phrase or in parentheses.
Harris et al. (2001) argued...
(Harris et al., 2001)
Unknown Author: If the work does not have an author, cite the source by its title in the signal phrase or use the first word or two in the parentheses. Titles of books and reports are italicized; titles of articles, chapters, and web pages are in quotation marks.
A similar study was done of students learning to format research papers ("Using APA," 2001).
Note: In the rare case the "Anonymous" is used for the author, treat it as the author's name (Anonymous, 2001). In the reference list, use the name Anonymous as the author.
Organization as an Author: If the author is an organization or a government agency, mention the organization in the signal phrase or in the parenthetical citation the first time you cite the source.
According to the American Psychological Association (2000),...
If the organization has a well-known abbreviation, include the abbreviation in brackets the first time the source is cited and then use only the abbreviation in later citations.
First citation: (Mothers Against Drunk Driving [MADD], 2000)
Second citation: (MADD, 2000)
Two or More Works in the Same Parentheses: When your parenthetical citation includes two or more works, order them the same way they appear in the reference list (viz., alphabetically), separated by a semi-colon.
(Berndt, 2002; Harlow, 1983)
Authors With the Same Last Name: To prevent confusion, use first initials with the last names.
(E. Johnson, 2001; L. Johnson, 1998)
Two or More Works by the Same Author in the Same Year: If you have two sources by the same author in the same year, use lower-case letters (a, b, c) with the year to order the entries in the reference list. Use the lower-case letters with the year in the in-text citation.
Research by Berndt (1981a) illustrated that...
Introductions, Prefaces, Forewords, and Afterwords: When citing an Introduction, Preface, Foreword, or Afterword in-text, cite the appropriate author and year as usual.
Personal Communication: For interviews, letters, e-mails, and other person-to-person communication, cite the communicator's name, the fact that it was personal communication, and the date of the communication. Do not include personal communication in the reference list.
(E. Robbins, personal communication, January 4, 2001).
A. P. Smith also claimed that many of her students had difficulties with APA style (personal communication, November 3, 2002).
Citing Indirect Sources
If you use a source that was cited in another source, name the original source in your signal phrase. List the secondary source in your reference list and include the secondary source in the parentheses.
Johnson argued that...(as cited in Smith, 2003, p. 102).
Note: When citing material in parentheses, set off the citation with a comma, as above. Also, try to locate the original material and cite the original source.
If possible, cite an electronic document the same as any other document by using the author-date style.
Kenneth (2000) explained...
Unknown Author and Unknown Date: If no author or date is given, use the title in your signal phrase or the first word or two of the title in the parentheses and use the abbreviation "n.d." (for "no date").
Another study of students and research decisions discovered that students succeeded with tutoring ("Tutoring and APA," n.d.).
Sources Without Page Numbers
When an electronic source lacks page numbers, you should try to include information that will help readers find the passage being cited. When an electronic document has numbered paragraphs, use the abbreviation "para." followed by the paragraph number (Hall, 2001, para. 5). If the paragraphs are not numbered and the document includes headings, provide the appropriate heading and specify the paragraph under that heading. Note that in some electronic sources, like webpages, people can use the "find" function in their browser to locate any passages you cite.
According to Smith (1997), ... (Mind over Matter section, para. 6).
Note: Never use the page numbers of webpages you print out; different computers print webpages with different pagination.
How to Quote a Source
Introducing a quotation
One of your jobs as a writer is to guide your reader through your text. Don't simply drop quotations into your paper and leave it to the reader to make connections.
Integrating a quotation into your text usually involves two elements:
A signal that a quotation is coming--generally the author's name and/or a reference to the work
An assertion that indicates the relationship of the quotation to your text
Often both the signal and the assertion appear in a single introductory statement, as in the example below. Notice how a transitional phrase also serves to connect the quotation smoothly to the introductory statement.
Ross (1993), in her study of poor and working-class mothers in London from 1870-1918 [signal], makes it clear that economic status to a large extent determined the meaning of motherhood [assertion]. Among this population [connection], "To mother was to work for and organize household subsistence" (p. 9).
The signal can also come after the assertion, again with a connecting word or phrase:
Illness was rarely a routine matter in the nineteenth century [assertion]. As [connection] Ross observes [signal], "Maternal thinking about children's health revolved around the possibility of a child's maiming or death" (p. 166).
Short direct prose
Incorporate short direct prose quotations into the text of your paper and enclose them in double quotation marks:
According to Jonathan Clarke, "Professional diplomats often say that trying to think diplomatically about foreign policy is a waste of time." 1
Longer prose quotations
Begin longer quotations (for instance, in the APA system, 40 words or more) on a new line and indent the entire quotation (i.e., put in block form), with no quotation marks at beginning or end, as in the quoted passage from our Successful vs. Unsucessful Paraphrases page.
Rules about the minimum length of block quotations, how many spaces to indent, and whether to single- or double-space extended quotations vary with different documentation systems; check the guidelines for the system you're using.
Quotation of Up to 3 Lines of Poetry
Quotations of up to 3 lines of poetry should be integrated into your sentence. For example:
In Julius Caesar, Antony begins his famous speech with "Friends, Romans, Countrymen, lend me your ears; / I come to bury Caesar, not to praise him" (III.ii.75-76).
Notice that a slash (/) with a space on either side is used to separate lines.
Quotation of More than 3 Lines of Poetry
More than 3 lines of poetry should be indented. As with any extended (indented) quotation, do not use quotation marks unless you need to indicate a quotation within your quotation.
Punctuating with Quotation Marks
With short quotations, place citations outside of closing quotation marks, followed by sentence punctuation (period, question mark, comma, semi-colon, colon):
Menand (2002) characterizes language as "a social weapon" (p. 115).
With block quotations, check the guidelines for the documentation system you are using.
Commas and periods
Place inside closing quotation marks when no parenthetical citation follows:
Hertzberg (2002) notes that "treating the Constitution as imperfect is not new," but because of Dahl's credentials, his "apostasy merits attention" (p. 85).
Semicolons and colons
Place outside of closing quotation marks (or after a parenthetical citation).
Question marks and exclamation points
Place inside closing quotation marks if the quotation is a question/exclamation:
Menand (2001) acknowledges that H. W. Fowler's Modern English Usage is "a classic of the language," but he asks, "Is it a dead classic?" (p. 114).
[Note that a period still follows the closing parenthesis.]
Place outside of closing quotation marks if the entire sentence containing the quotation is a question or exclamation:
How many students actually read the guide to find out what is meant by "academic misconduct"?
Quotation within a quotation
Use single quotation marks for the embedded quotation:
According to Hertzberg (2002), Dahl gives the U. S. Constitution "bad marks in 'democratic fairness' and 'encouraging consensus'" (p. 90).
[The phrases "democratic fairness" and "encouraging consensus" are already in quotation marks in Dahl's sentence.]
Indicating Changes in Quotations
Quoting Only a Portion of the Whole
Use ellipsis points (. . .) to indicate an omission within a quotation--but not at the beginning or end unless it's not obvious that you're quoting only a portion of the whole.
Adding Clarification, Comment, or Correction
Within quotations, use square brackets [ ] (not parentheses) to add your own clarification, comment, or correction.
Use [sic] (meaning "so" or "thus") to indicate that a mistake is in the source you're quoting and is not your own.
Notes1. "The Conceptual Poverty of U.S. Foreign Policy," Atlantic, September 1993, 55.