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Zotero: What is Zotero?
Zotero is a tool that helps you organize your citations. It works within your Firefox or Google Chrome browser (or as a stand-alone client) to help you collect, manage, and cite your research sources.
(pronounced "zoh-TAIR-oh") is an add-on that collects, manages, and cites research sources.
It's easy to use, lives in your web browser where you do your work, and best of all it's free and open source. Zotero allows you to attach PDFs, notes and images to your citations, organize them into collections for different projects, and create bibliographies.