Your instructor usually determines which style guide he or she wants you to use in your papers. If you don't know--ASK THEM!
AMA Manual of Style
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.
Journal Abbreviations: National Library of Medicine
List of publications indexed in PubMed, including journal information and abbreviations.
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.”