Just as there is a References tab in MS Word to assist in the creating of citation management (footnotes/endnotes/ bibliographies) in users' research papers, so too is there a free, downloadable plugin from EndNote Web. Use this plugin feature to insert references, and format citations and bibliographies automatically while you write your papers in Word. The EndNote Web Plug-in also allows you to save online references to your library in Internet Explorer for Windows.
More information on the Cite While You Write Plugin can be found here.