Zotero is a free, open-source citation management tool that will help you to save and organize sources, create citations in a wide variety of formats, and share sources with others in a group. You can use Zotero by creating an account on their website or by downloading and installing the Zotero app. The Zotero app will also give you the ability to add citations from Zotero directly to Microsoft Word and Google Docs.
The Zotero Connector browser plug-in makes it easy to save sources you find online. It is available for the Chrome, Firefox, Safari, and Edge web browsers.
ZoteroBib is a web-based tool from Zotero that will create quick citations. You do not need to download anything or sign up for an account to use ZoteroBib, and it can be used on mobile devices.