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 three of the most commonly used citation styles, but there are hundreds.
Recent editions of style manuals, which include detailed information and examples, are available at Research & Instruction Desks at the Main Library and the Science Library. If you need help on your research project, please contact a subject specialist librarian.
For quick reference, there are many online sources. One of the best is the Purdue OWL. But be aware that the manual is always the most authoritative source.