Sometimes sources don't contain page numbers, especially online resources. If this is case, use paragraph numbers, if provided.
Example: (para. 7)
If neither page numbers nor paragraph numbers are visible, cite the heading and the number of the paragraph.
Example: (Methods section, para. 3)
If the heading title is long, use a short title enclosed in quotation marks.
Example from page 172 in the manual:
"Empirical studies have found mixed results on the efficacy of labels in educating consumers and changing consumption behavior" (Golan, Kuchler, & Krissof, 2007, "Mandatory Labeling Has Targeted," para. 4).
(The long heading was "Mandatory Labeling Has Targeted Information Gaps and Social Objectives.")
For more information, see p.171-172 - Direct Quotations of Online Materials without Pagination
All information and page number references are based on the 6th edition of the Publication Manual of the American Psychological Association (2009/10).
Need a copy of the Publication Manual? Click here for details. See Also: APA Style Guide to Electronic References, Sixth Edition