There are quite a few different ways to properly cite resources in your paper. The citation style usually depends on the academic discipline involved. For example:
APA style (American Psychological Association) often is used by Education, Psychology, and Business
Chicago (Professor Turabian, University of Chicago) is generally used by History and some of the Fine Arts.
When determining which style to use there are several resources to keep in mind:
Ask your professor which style s/he prefers for the course.
Consult a style guide for examples of using various citation styles to create in-text citations, bibliographies and reference lists, or use citation software to assist you in tracking sources used and building in-text citations and bibliographies.
Bottom line: Check with your professor to make sure you use the style required for that class. And whatever style you choose, BE CONSISTENT!
Zotero (pronounced "zoh-TAIR-oh") is a browser add-on that collects, manages, and cites research sources. It's easy to use, lives in your web browser where you do your work, and best of all it's free. Zotero allows you to attach PDFs, notes and images to your citations, organize them into collections for different projects, and create bibliographies.