The source for this information is the Online Writing Lab (OWL) at Purdue University. The easiest way to get there is to Google: Purdue Owl MLA.
MLA format for Magazine Articles:
Author's last name, Author's first name. "Title of Article: Subtitle." Title of Periodical or Magazine Day Month Year: pages. Medium of Publication.
Here's an example:
Slouka, Mark. "Dehumanized: When Math and Science Rule the School." Harper's Magazine Sep. 2009: 38-40. Web. 17 Oct. 2013.
1) on the screen that displays a single article, use the cite button
2) on the SAVE or EMAIL screen, select your format, then SAVE or SEND. The article's citation will appear in MLA format when you retrieve it.
1) on the screen that displays a single article, use the CITE button
2) on the EMAIL screen, select your style, then SEND. The article's citation will appear in that format when you retrieve it.