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).
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).
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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.
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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).
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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.
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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.
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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)
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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).
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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.
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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.
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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 ).
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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.
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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.
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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 ).
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