See also APA Style for Documenting Web Sources

Here are selected examples from the Publication Manual of the American Psychological Association (Fourth Edition), also known as the APA Style Manual.

Book:
 Mitchell, T. R., & Larson, J. R., Jr. (1987). People in organizations: An introduction to organizational behavior (3rd ed.). New York: McGraw-Hill.

Journal article:
 Borman, W. C., Hanson, M. A., & White, L. A. (1993). Role of early supervisory experience in supervisor performance. Journal of Applied Psychology, 78, 443-449.

•  If the journal paginates each issue separately, add an issue number in parentheses:

Magazine article:
 Posner, M. I. (1993, October 29). Seeing the mind. Science, 262, 673-674.

• Give the date shown on the publication--month for monthlies or month and day for weeklies.
• Give the volume number.

Entry in an encyclopedia:
 Bergman, P. G. (1993). Relativity. In The new encyclopedia Britannica (Vol. 26, pp. 501-508). Chicago: Encyclopedia Britannica.

• If an entry has no byline, begin the reference with the entry title and publication date.

• Format references to brochures in the same way as those to entire books.
• In brackets, identify the publication as a brochure.

From: Web Extension to American Psychological Association Style (WEAPAS). (Rev. 1.4.3) by T. Land (a.k.a. Beads), written as a supplement to the APA Style Manual. Land's style sheet differs slightly from the book’s version of how to cite electronic sources, but it is a "proposed standard for referencing online documents in scientific publications." You can go to WEAPAS for full explanations of each element in a citation and more examples.

Examples:
The citation for the document from which the information here was taken is as follows:

Land, T. [a.k.a Beads] (1997, October 21). Web Extension to American Psychological
Association Style (WEAPAS) (Rev. 1.4.3) [WWW document]. URL http://www.beadsland.com/weapas/

Article in a larger work:
Quinion, M. (1996, March 10). Citing online sources. World Wide Words: Michael Quinion on
aspects of English [WWW document]. URL http://clever.net/quinion/words/citation.htm

(Note that this is similar to an article in a magazine, where the article title is given first, and the magazine title is put in italics or underlined. As with all titles in APA style, only the first word and proper nouns are capitalized).

Two authors:
Li, X., and Crane, N. (1996, May 20) Bibliographic formats for citing electronic information [WWW document]. URL http://www.uvm.edu/~ncrane/estyles/

Partial date or no date:
Dewey, R. (n.d./1996). APA publication manual crib sheet. Psych Web by Russ Dewey [WWW document]. URL http://www.gasou.edu/psychweb/tipsheet/apacrib.htm

Corporate author:
World Wide Web Consortium (W3C) (1995, May 15). About the World Wide Web [WWW document]. URL http://www.w3.org/hypertext/WWW/WWW/

Additional hints:
You are expected to look at the full page and any links from the page to a home page or other explanatory material in order to determine the date and any author information available for the document you are citing.

Land adds the option of including a visiting date: "Optionally, one may choose to list the date a document was downloaded or viewed online, should there be a concern that the document might expire in the foreseeable future. Such dates come at the end of the reference, parenthesized in the form ‘(visited Year, Month Date).’"

Be sure to get the full URL from your source. Long URLs may not print out when you print the page, so you must copy the URL by hand or print out the Document Information (go to the View menu and select Document Info).

NHD, January 1999