Use the tools linked on this page, and remember that you can always get help from:
The Online Writing Lab (OWL) located at Purdue University has some the best online citation guides available. These comprehensive OWL guides are linked below.
And, as always, ask a librarian for help any time of the day or night.
From the Modern Language Association:
The following sites allow you to automatically create formatted citations and to store and manage your citations. Be aware that these citation tools provide basic functions at no charge; advanced tools may be available only for a fee.
NOTE: It's advisable to check automatically generated citations. They may contain inaccuracies which you need to correct.