Reference Management Tool:
There are several free online tools that can help you with referencing in writing research papers, dissertations and thesis, etc. Please see the providers' websites for further details.
1. Mendeley
A reference management system that helps you organize PDFs and create bibliographies.
2. Zotero
An open-source reference manager that is notable for its ease of use, its ability to grab screenshots, and its capabilities for archiving website content for local storage.
3. Endnote
The free version of EndNote basic has 21 styles and a limited number of filters and connection files. This version is available to anybody, with no other purchase required.
Others are: