Mendeley is a free citation management tool that can help you
First, create an account by visiting www.mendeley.com, and follow the "Create account" link.
Download Mendeley Desktop so that you will have access to all the Mendeley features, including the write & cite functionality.
Install the Mendeley Web Importer into your web browser to import references and PDF documents from web sites.
Install the Mendeley Citation Plugin, which will allow you to insert citations and generate bibliographies into your Microsoft Word document.
A free Mendeley account receives: