Your instructor usually determines which style guide he or she wants you to use in your papers. If you don't know--ASK THEM!
Citation software
Quick Citation Formatting in Databases. Many databases
allow you to format citations into various writing styles. When available, look
for the wording “cite” or “cite now,” or see if it is
an option after clicking on “save, print, email.”
Citation and annotation tool. Mendeley is also intended as an academic social network. Allows highlighting and making notes in PDF document. Mendeley also offers a mobile app.
This citation management tool works with the Firefox Web browser, or it can be installed as a stand-alone program on your computer with plugins for other Chrome, Safari, or Firefox.