APA- Issue Number

I was browsing through the library's "Writing Resources for Students" and I was clicking and clicking and I came upon an APA guide in the APA official website. In the guide, there is a disclaimer about electronic resources and the things that need to be included in the references page. If you find a journal online: "For journal articles, always include the journal issue number (if available) along with the volume number, regardless of whether the journal is paginated separately by issue or continuously by volume. This change in reference style from the fifth edition of the Publication Manual is intended to make the format for journal article references more consistent." This is a gray area for many students who write in APA because professors either demand the issue number, or they don't care either way. This is an update in the electronic references guide, and it popped out at me because I have been confused on whether to identify the issue number or not because of professor preference. Now it is a rule and I would mention to the client if they are also unsure. The "Writing Resources for Students" is almost as entertaining as the "Harvard Writing Center" website... American Psychological Association. (2008). Electronic references. APA Style.org. Retrieved September 8, 2008, from http://www.apastyle.org/elecmedia.html