Zotero: The Tri-College Libraries recommend Zotero, a free online app that can format your bibliography, keep your citations organized, and even save your articles in the cloud so you can access them later from the library, home, or a café.
The most commonly used citation styles are those created by the Modern Languages Association, the American Psychological Association, and the University of Chicago. See resources below for details. For information about other citation styles, see:
Citation (Tricollege guide)
Research and Citation Sources (Purdue OWL (Online Writing Lab)