The ACM (Association for Computing Machinery) has its own citation system, called ACM-LaTeX. Click here to learn about it and download it.
The IEEE also uses Latex and has its own site to help with article formatting. Click to access their IEEE Author Digital Toolbox.
There are other citation guides, such as the Council of Science Editor's Scientific Style and Format Guide:
Elon's Writing Center will help you understand an assignment, as well as brainstorm, draft, revise, edit & document sources.
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: