Zotero is a free, open-source citation tool that you can use after you graduate! They tend to provide good user-support through the Zotero community. Lots of how-to videos via YouTube. Their quick citation generator is a new tool, in addition to the full (free) software available to download.
RefWorks is a web-based program that allows you to create your own personal database of references.
Users can import references from a search performed in an online database automatically, or enter references manually.
RefWorks also interfaces directly with Word, making it easy to import citations and incorporate them into your writing as properly formatted footnotes or in-text citations according to the writing style of your choice (MLA, APA, and hundreds others).
Link to set up your own RefWorks account (and other citation tools such as Zotero)