Elon's Writing Center will help you understand an assignment, as well as brainstorm, draft, revise, edit & document sources.
The American Mathematical Society has its own citation system, called AMS-LaTeX. Click here to learn about it and download it.
Mathematics Education uses APA, the Publication Manual of the American Psychological Association. Copies can be found at the Information Desk or in the Writing Center. A good guide can also be found online.
If in doubt, ask your professor.
In addition, there is the Council of Science Editor's Scientific Style and Format Guide:
The zotero Citation Manager is a free, easy to use tool to help you collect, organize, cite, and share your research sources.
Follow these steps to start building your own Zotero Library: