Commonly referred to as bibliographic, reference, or citation managers, these tools are freely available (you can upgrade for a fee) and allow you to build your own database of resources in a wide variety of formats. Each allows you to:
Below you will find information for Zotero and Mendeley two of the commonly used citation managers. Though both work a bit differently they provide similar services and document outputs.
Zotero is an open-source bibliographic management tool that allows you to save citations directly from library databases in any citation format you choose. You can also use Zotero to create bibliographies and lists of references for term papers. Zotero is free, just for signing up, and you'll keep your account after you graduate. It requires a one-time download.
Zotero for MLA, APA, Chicago and more Guide
Zotero FAQs: https://www.zotero.org/support/frequently_asked_questions
Zotero - Support guides and information
Quick Guide - Creating bibliographies with Zotero