Use quotation marks to set off the titles of articles, songs, short stories, poems (except book-length ones), episodes of television series, and other short works (see Chapters 21 and 22 for a fuller discussion of citing articles).
“Words on Trial,” by Jack Hitt, in the July 23, 2012, issue of the New Yorker, discusses forensic linguistics.
My favorite song by Vogon Soup is “Paula Nancy Millstone Jennings.”
For the titles of longer works, use italics instead of quotation marks.