APA style for in-text citations

APA style requires parenthetical references in the text to document quotations, paraphrases, summaries, and other material from a source. These citations correspond to full bibliographic entries in a list of references at the end of the text.

Note that APA style generally calls for using the past tense or present perfect tense for signal verbs: Baker (2003) showed or Baker (2003) has shown. Use the present tense only to discuss results (the experiment demonstrates) or widely accepted information (researchers agree).

An in-text citation in APAstyle always indicates which source on the references page the writer is referring to, and it explains in what year the material was published; for quoted material, the in-text citation also indicates where in the source the quotation can be found.

1. Basic format for a quotation
2. Basic format for a paraphrase or summary
3. Two authors
4. Three to five authors
5. Six or more authors
6. Corporate or group author
7. Unknown author
8. Two or more authors with the same last name
9. Two or more works by an author in a single year
10. Two or more sources in one parenthetical reference
11. Indirect source
12. Personal communication
13. Electronic document
14. Table or figure reproduced in the text

1. BASIC FORMAT FOR A QUOTATION

Generally, use the author’s name in a signal phrase to introduce the cited material, and place the date, in parentheses, immediately after the author’s name. The page number, preceded by p., appears in parentheses after the quotation.

Gitlin (2001) pointed out that “political critics, convinced that the media are rigged against them, are often blind to other substantial reasons why their causes are unpersuasive” (p. 141).

If the author is not named in a signal phrase, place the author’s name, the year, and the page number in parentheses after the quotation: (Gitlin, 2001, p. 141).

2. BASIC FORMAT FOR A PARAPHRASE OR SUMMARY

Include the author’s last name and the year as in model 1, but omit the page or paragraph number unless the reader will need it to find the material in a long work.

Gitlin (2001) has argued that critics sometimes overestimate the influence of the media on modern life.

3. TWO AUTHORS

Use both names in all citations. Use and in a signal phrase, but use an ampersand (&) in parentheses.

Babcock and Laschever (2003) have suggested that many women do not negotiate their salaries and pay raises as vigorously as their male counterparts do.

A recent study has suggested that many women do not negotiate their salaries and pay raises as vigorously as their male counterparts do (Babcock & Laschever, 2003).

4. THREE TO FIVE AUTHORS

List all the authors’ names for the first reference.

Safer, Voccola, Hurd, and Goodwin (2003) reached somewhat different conclusions by designing a study that was less dependent on subjective judgment than were previous studies.

In subsequent references, use just the first author’s name plus et al.

Based on the results, Safer et al. (2003) determined that the apes took signifi cant steps toward self-expression.

5. SIX OR MORE AUTHORS

Use only the first author’s name and et al. in every citation.

As Soleim et al. (2002) demonstrated, advertising holds the potential for distorting and manipulating “free-willed” consumers.

6. CORPORATE OR GROUP AUTHOR

If the name of the organization or corporation is long, spell it out the first time you use it, followed by an abbreviation in brackets. In later references, use the abbreviation only.

FIRST CITATION (Centers for Disease Control and Prevention [CDC], 2006)

LATER CITATIONS (CDC, 2006)

7. UNKNOWN AUTHOR

Use the title or its first few words in a signal phrase or in parentheses. A book’s title is italicized, as in the following example; an article’s title is placed in quotation marks.

The employment profiles for this time period substantiated the trend (Federal Employment, 2001).

8. TWO OR MORE AUTHORS WITH THE SAME LAST NAME

If your list of references includes works by different authors with the same last name, include the authors’ initials in each citation.

S. Bartolomeo (2000) conducted the groundbreaking study on teenage childbearing.

9. TWO OR MORE WORKS BY AN AUTHOR IN A SINGLE YEAR

Assign lowercase letters (a, b, and so on) alphabetically by title, and include the letters after the year.

Gordon (2004b) examined this trend in more detail.

10. TWO OR MORE SOURCES IN ONE PARENTHETICAL REFERENCE

List sources by different authors in alphabetical order by authors’ last names, separated by semicolons: (Cardone, 1998; Lai, 2002). List works by the same author in chronological order, separated by commas: (Lai, 2000, 2002).

11. INDIRECT SOURCE

Use the phrase as cited in to indicate that you are reporting information from a secondary source. Name the original source in a signal phrase, but list the secondary source in your list of references.

Amartya Sen developed the infl uential concept that land reform was necessary for “promoting opportunity” among the poor (as cited in Driver, 2007, para. 2 ).

12. PERSONAL COMMUNICATION

Cite any personal letters, email messages, electronic postings, telephone conversations, or interviews as shown. Do not include personal communications in the reference list.

R. Tobin (personal communication, November 4, 2006) supported his claims about music therapy with new evidence.

13. ELECTRONIC DOCUMENT

Cite a Web or electronic document as you would a print source, using the author’s name and date.

Link and Phelan (2005) argued for broader interventions in public health that would be accessible to anyone, regardless of individual wealth.

14. TABLE OR FIGURE REPRODUCED IN THE TEXT

Number figures (graphs, charts, illustrations, and photographs) and tables separately.

For a table, place the label (Table 1) and an informative heading (Hartman’s Key Personality Traits) above the table; below, provide information about its source.

Table 1
Hartman's Key Personality Traits


Color


Trait category Red Blue White Yellow

Motive Power Intimacy Peace Fun
Strengths Loyal to tasks Loyal to people Tolerant Positive
Limitations Arrogant Self-righteous Timid Uncommitted

Note. Table is adapted from information found at The Hartman Personality Profile, by N. Hayden. Retrieved February 24, 2009, from http://students.cs.byu.edu/~nhayden/Code/index.php

For a figure, place the label (Figure 3) and a caption indicating the source below the image. If you do not cite the source of the table or figure elsewhere in your text, you do not need to include the source on your list of references.

The APA recommends the following for electronic sources without names, dates, or page numbers:

AUTHOR UNKNOWN Use a shortened form of the title in a signal phrase or in parentheses (see model 7). If an organization is the author, see model 6.

DATE UNKNOWN
Use the abbreviation n.d. (for “no date”) in place of the year: (Hopkins, n.d.).

NO PAGE NUMBERS
Many works found online or in electronic databases lack stable page numbers. (Use the page numbers for an electronic work in a format, such as PDF, that has stable pagination.) If paragraph numbers are included in such a source, use the symbol ¶ or the abbreviation para: (Giambetti, 2006, para. 7). If no paragraph numbers are included but the source includes headings, give the heading and identify the paragraph in the section:

Jacobs and Johnson (2007) have argued that “the South African media is still highly concentrated and not very diverse in terms of race and class” (South African Media after Apartheid, para. 3 ).