If you have a lot of sources, it's a good idea to find a system to help you keep track of them.
This could be as simple as Word or Google document in which you keep track each quote you're planning to use, along with where that quote came from and how you accessed it.
You can also use citation generators, such as EasyBib, or citation managers, like Zotero.
Have a lot of sources? Looking for a way to stay organized? Try Zotero, a free tool that helps you keep track of sources and generate bibliographies. Learn more about it on Preus Library's Zotero Guide!