Zotero is a free citation management tool that allows you to...
Should I use it?
Organizing and citing sources can be challenging. Zotero can help! Like any tool, it has a learning curve, but it's fairly intuitive and free to use. There is plenty of online documentation, and your librarians can assist you with it, so it may be a good choice for you.
What if my references are already in RefWorks (or another citation management tool)?
It's relatively easy to export your references from another tool, like RefWorks. Again, there is online documentation and your librarians can help.