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American Psychological Association (APA) Style Guide

This page is intended to be used as a guide. Please refer to the Publication Manual of the American Psychological Association (5th ed.) as a definitive source.

The Reference Librarians at the Health Sciences Library are available to help you interpret correct APA style.

Throughout this guide:
a pale blue box is used for in-text examples
and a pink box is used for examples from the reference list.

Formatting Your Paper
  

Groups as Authors  
Authors with the Same Surname  
Works with No Authors Listed   Citing More Than One Work at a Time
Using Quotations  Works with No Date Listed   Reference Examples 
Paraphrasing   Works with Multiple Authors     Further Resources

          
Formatting Your Paper


  • Set margins at least 1” all around.

  •  Use 12 point font size (Courier or Times Roman).

  •  All text should be double spaced.

  •  Page numbers should be in the upper right hand corner of the page, beginning with the title page.

  •  Each page should be identified with a header containing the first two or three words of the title of the paper. The header should be placed in the upper right-hand corner, above or five spaces to the left of the page number.

  •  Indent the first line of every paragraph 5-7 spaces.

Using Numbers

Refer to the APA Publication Manual for a complete list of exceptions to the following rules.


  • Use figures to express numbers 10 and above.

32 exposures

the final 25%

10 miles long


  •
 Use figures to express numbers that represent time, date, age, population or sample size.

a 2 week period

4-year olds

3 participants

 

  • Use figures to express numbers that represent mathematical or statistical functions.

about 7% of children

divided by 5

a ratio of 4:1

 

  • Use words to express numbers below 10.

the third test

seven cities

 

  • Use words to express any number that begins a sentence.

Fifty-four percent of the respondents were retired.

Ten participants from each community were asked to complete a survey.

.
Using Quotations

  • When quoting provide the author, year and page number. Enclose all quotations, except those of 40 or more words, in double quotation marks.

According to Mulvey (2006), “Any discussion about the prospects of retirement security for the baby boomers must take

into account the potentially devastating costs of future long term care services” (p. 54).


Mulvey (2006) points out “the potentially devastating costs of future long term care services” (p. 54) must be taken into

account.
 

The “potentially devastating costs of future long term care services” (Mulvey, 2006, p. 54) affect the retirement outlook

for baby boomers.

  • Quotations of 40 or more words are indented five spaces and blocked.

Mulvey (2006) explains:

        Any discussion about the prospects of retirement

        security for the baby boomers must take into account

        the potentially devastating costs of future long term care services.

        The reality is individual savings is not going to

        be sufficient to pay for long term care services for middle income

        Americans, and the government will face ever increasing

        fiscal pressures as the baby boomers age

        and become eligible for Social Security and Medicare. (p. 54)


Omissions in Quotations

  • Use an ellipsis (three dots) to indicate omitted words in a sentence. Use a period and an ellipsis (four dots) to indicate an omission between two sentences. 

Mulvey (2006) notes, “Any discussion … must take into account the potentially devastating costs of future long term care

services” (p. 54).

 

Mulvey (2006) notes, “Individual savings is not going to be sufficient to pay for long term care services …. and employers

should consider carefully how they could help to motivate workers to purchase long term care insurance at younger ages

when it is more affordable" (p.54).

Paraphrasing

  • When paraphrasing you must credit the source, as you would when quoting.

Phillips (2006) explains how increasing knowledge of the genetic basis of disease is changing the landscape of health

care.


Increasing knowledge of the genetic basis of disease is changing the landscape of health care (Phillips, 2006).


Groups as Authors

  • Groups, such as government agencies, corporations and associations, are spelled out in the reference list and the first time they appear cited in the text (followed by the abbreviation). Subsequent text citations are abbreviated only.

Centers for Disease Control and Prevention. (2006). MMWR weekly: Summary of notifiable diseases. Retrieved October 4, 2006, from

      http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5353a1.htm


First Citing in Text:

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

Subsequent Citings in Text:

(CDC, 2006)

 
Works with No Authors Listed

  •  When a work, such as an article or web page, has no author (not even a corporate body), use the first few words of the title in quotation marks to substitute for the name of the author. If the work is a book, brochure or report, use italics instead of quotation marks.

  An article or web site entitled Building Healthy Futures for All Children would appear cited in the text as

(“Building Healthy Futures,” 2004)

  A book or report with the same title would appear as

(Building Healthy Futures, 2004)

  •  If a work’s author is presented as Anonymous, cite the work as though Anonymous were the author’s name.

(Anonymous, 2006)


Works with no Date Listed

  •  Use n.d. for no date.

(U.S. Department of Health and Human Services, n.d.)

 

U.S. Department of Health and Human Services. (n.d.). Healthy people 2010: What is healthy people? Retrieved

     October 6, 2006, from http://www.healthypeople.gov/About/whatis.htm


Works with Multiple Authors

Two Authors

  •  Always cite both names. Use an ampersand instead of “and”.

(Doyle & Christie, 1998)

 

Pagliusi, S. R., & Aguado, M. T. (2004). Efficacy and other milestones for human papillomavirus vaccine introduction.

      Vaccine, 23(5), 569-578.

Three to Five Authors

  •  All authors should be named the first time the reference is used. Afterwards, use only the surname of the first author followed by et al.

First Citing in Text:

(Millin, Jenkins, & Kirsch, 2006)

  Subsequent Citings in Text:

(Millin et al., 2006)

 

Millin, M. G., Jenkins, J. L., & Kirsch, T. (2006). A comparative analysis of two external health care disaster responses

      following hurricane Katrina. Prehospital Emergency Care, 10(4), 451-456
.

     Six or More Authors

  •  Cite only the first author followed by et al.  In the reference list, write the names of the first six authors and use et al. to designate any further authors.

(Sailaja et al., 2006)
Sailaja, N., Chandrasekhar, M., Rekhadevi, P. V., Mahboob, M., Rahman, M. F., & Vuyyuri, S. B., et al. (2006).

     Genotoxic evaluation of workers employed in pesticide production. Mutation Research - Genetic Toxicology and

     Environmental Mutagenesis
, 609(1), 74-80.

Authors with the Same Surname

  •  Include the authors’ initials in all citations.

(W. Smith, 1976)

(D. T. Smith, 2003)

Citing More than One Work at Once

  •  Works should appear within the same parenthesis in the same order as they would in the reference list.

(Harper, 1988; Rodgers, 1941)


Examples of References


     Article from a Print Journal

Goodman, R. M., Yoo, S., & Jack, L. J. (2006). Applying comprehensive community-based approaches in diabetes prevention:      

      Rationale, principles, and models. Journal of Public Health Management and Practice, 12(6), 545-555.

     Article Retreived Electronically

  •  When an article is an exact copy of the original print version you may reference it as print, but if you have only viewed it electronically use the designation [Electronic version].

Swanson, G. M. (2006). Epidemiology -  the leading health discipline [Electronic version]. Annals of Epidemiology,

      16(10), 794-795.


  •  When the electronic version has content not found in the print version, include the retrieval date and URL and use the designation [Online exclusive].

Keeley, E. C., & Grines, C. L. (2004). Primary coronary intervention for acute myocardial infarction [Online exclusive]. Journal of the

      American Medical Association
, 291(6), 736-739. Retrieved October 4, 2006, from

      http://jama.ama-assn.org/cgi/reprint/291/6/736

    Whenever an article has a digital object identifier (DOI), use it in place of the URL and omit the retrieval date.

Breckenkamp, J., Wiskow, C., & Laaser, U. (2007). Progress on quality management in the German health system: a long and winding
     
      road. Health Research Policy and Systems, 5(7). doi:10.1186/1478-4505-5-7

   Article Retreived From a Database

  •  Include the retrieval date and the name of the database.
Remember to use the DOI, instead of the URL and retreival date, if the DOI is provided.

Wielawski, I. (2006). HIPAA, TB, and me. Health Affairs, 25(4), 1127-1132. Retrieved October 18, 2006, from the

      CINAHL database.


     Non-Periodical Document on the Internet (Web page)

  •  Provide a URL that links directly to the words you are citing. When an internet document has numerous sections with different URLs, supply the URL to the entry (home) page.

U.S. Department of Health and Human Services. (2006). Pandemic planning assumptions. Retrieved March 11, 2006,

      from http://pandemicflu.gov/plan/pandplan.html

     Book

Omoto, A. M., & Kurtzman, H. S. (2006). Sexual orientation and mental health: Examining identity and development in

      lesbian, gay and bisexual people
. Washington, DC: American Psychological Association.

     Edited Book

Isaacs, S.L., & Knickman, J.R. (Eds.). (1999). To improve health and health care 2000: The Robert Wood Johnson

      foundation anthology
. San Francisco: Jossey-Bass.

     Book Chapter

Leaning, J. (1993). War and the environment: Human health consequences of the environmental damage of war. In E.

      Chivian, M. McCally, H. Hu, & A. Haines (Eds.), Critical condition: Human health and the environment (pp. 123-137).

      Cambridge, MA: MIT Press.

 

Further Resources to Help You Master APA Style

American Psychological Association. (2001). Publication manual of the American Psychological Association (5th ed.). Washington, DC:   American Psychological Association.   WZ345. A35. 2001

American Psychological Association. (2006). Concise Rules of APA Style (2005). Washington, DC: American Psychological   Association. WZ345 C744 2005

American Psychological Association. (2007). APA style guide to electronic references. Washington, DC: American Psychological Association. WZ345 A639 2007

 American Psychological Association. (n.d.). APA Style Tips . Retrieved October 16, 2006, from http://www.apastyle.org/previoustips.html


  •
 If you need help, contact the Reference Librarians at the Health Sciences Library.

 

 

Updated by D. Crooke 3/13/2008

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