Answered By: Theresa Bell Last Updated: Nov 15, 2017 Views: 768
A journal's volume number describes how many issues of a journal have been published in a year. The journal issue number is provided if each issue starts the page numbering at 1 (American Psychological Association, 2010, p. 198). Please see "Got Volume?" from the APA Style Blog for instructions on how to create a reference when the volume number is missing.
American Psychological Association. (2010). Publication manual of the American Psychological Association (6th ed.). Washington, DC: Author.