Zotero is a freeware which by using the web browser Mozilla Firefox helps you to collect, manage and insert your references. You can use a "standalone" application for the webbrowsers Chrome and Safari. It is compatible with MS word, Open office and Google docs. Zotero

Manuals and Tutorials

Zotero's quick start guide Zotero's online web tutorials Zotero's discussion forum If you want to know more or run into problems.