If a magazine article has been accessed online, then the citation ends with the URL of the magazine's website, even if you actually retrieved the article through a database. Use Google to find the URL of the magazine’s website.
Template:
Author, A. A. (Year, Month). Title of article: Subtitle of article. Title of Magazine, volume (issue), page range. Retrieved from http://...
Example:
Amiel, B. (2013, November 25). I'd take Rob Ford over some I could name. Maclean's, 126(46), 12. Retrieved from http://www.macleans.com
If an article is ONLY available through a database (i.e. when the magazine is no longer being published and so does not have a website) give the name of the database and the accession number of the article (or whatever unique number the database has assigned to the article).
Example:
Hunt, T. (2005, 12). 12 steps to nowhere: As an alcoholic who has not had a drink in five years, I've made it a point to avoid Alcoholics Anonymous. Saturday Night, 120, 19-20. Retrieved from CBCA Reference & Current Events. ProQuest document ID: 222426389