Your instructor usually determines which style guide he or she wants you to use in your papers. If you don't know--ASK THEM!
The AMA Manual of Style is available online. A paper version of the manual is also available in print in the Waldo Library Reference Collection. Call number: R 119 .A53 2007.
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.”