Sometimes a work is not credited to a single author but is, nonetheless, clearly issued by an organization. In this case, the organization should be listed as the author. Instead of beginning the reference-list entry with the last name and first initial of an author, begin it with the name of the authoring organization, followed by a period. The rest of the entry should follow standard APA rules for a reference list. For example, a book authored by an organization would be listed as follows:
American Psychological Association. (1990). Studies pertaining to sociology. Chicago, IL: APA Press.
Note that in APA style, the titles of books must be italicized.
If there is no author listed, and the work cannot be credited to an organization, then the title of the work should be listed first, followed by the date of publication. The rest of the entry will appear as usual. For example:
Studies pertaining to sociology. (1990). Chicago, IL: APA Press.
Normally the reference list in a work using APA-style should be alphabetized by last name of author. Organizations listed as authors follow the same rule. For example, a typical list of entries might appear as follows:
Allen, F.
American Psychological Association.
Bard, L.
If you are including an entry with no known author, you must alphabetize that entry according to the title. For example:
Smith, A.
Studies pertaining to sociology.
Szerinski, S.
The purpose of citing within the text is not only to credit sources but also to direct the reader to full bibliographic information in your reference list. For this reason, in-text citations must correspond exactly to reference-list entries. The typical APA-style in-text citation requires the author's last name, year of publication and page number in text: (Smith, 1980, p. 19). Page numbers are required for direct quotes, and the APA manual encourages the inclusion of page numbers for paraphrased material. If your reference-list entry is credited to an organization, list the name of the organization in the in-text citation: (American Psychological Association, 1980, p. 19). If you are citing a work with no author within the text, begin your citation with the title: ("Studies Pertaining to Sociology," 1980, p. 19). When you are citing titles within the text, italicize or underline the titles of major works such as books, and enclose the titles of minor works such as articles and book chapters within quotation marks.