This video tutorial explains why we use citations in academic writing for music. It also walks you through examples of how to cite books, scores, recordings, and online media according to the Chicago Manual of Style, 17th ed.
Zotero is a free, online citation management tool. It has a plug-in for Word that allows you to import footnotes and bibliographic citations directly from your Zotero account, and you can easily add journal articles, websites, and other content directly to Zotero by using its browser plug-in. You can find more information how to use Zotero on the Citation Management Research Guide.