There are many different "styles" you may choose from when citing sources. Your professor will probably tell you which "style" is preferred for your class. MLA (Modern Language Association), Chicago, and APA (American Psychological Association) are the three which are used most often by students at The Claremont Colleges.
The Purdue Owl website provides guides for
If you need to cite legal documents or government publications, or just understand the citations you find, the following guides will help.
The Claremont Colleges Library has an electronic version of the Chicago Manual of Style.