Mendeley is a web and desktop based application designed to help you gather, organize and cite all your references.
If you are using an earlier version of Word, you can use the existing Mendeley Citation Plugin for Word available with Mendeley Desktop. The Word Plugin is compatible with Windows Word 2007, 2010, 2013; Mac Word 2011, 2016; and LibreOffice.
A free Mendeley account provides:
The Mendeley Support site is a great place to look more information on all aspects of the program.