ZoteroBib is a tool from the makers of the Zotero citation manager--it's perfect for short bibliographies in lots of different citation formats
Style Manuals
The primary reasons for citing sources in a research paper are to give credit to the authors whose work you have drawn upon and to allow readers to track down your sources, should they wish to do so.
RefWorks is an online research management, writing, and collaboration tool designed to help researchers gather, manage, store, and share information and generate citations and bibliographies.