When you write a research paper or report you need to include a bibliography or a list of the books, articles, or other publications that you used in your research.The pieces of information used to describe a specific publication are grouped together to make up a citation or a bibliographic citation.
Why you need to cite your sources:
EndNote Web
Endnote Online is a FREE tool that can be used to create and manage citations for all your research projects.
Zotero
A free, easy-to-use Firefox extension to help you collect, manage, cite, and share your research sources. It lives right where you do your work—in the web browser itself.
Zotero Introduction
A gide to using Zotero to collect, organize, and cite your sources.