Sign-up to have your bibliography checked and get a perfect score. This usually takes about 45 minutes. If you select this option, then you agree to stay until you have made all the necessary changes and have gotten approval from Thurston. Failure to do so will result in a zero for the assignment.
Citations with dirty data vs Citations that have been cleaned up. If your citations look like the good rather than the bad & ugly, then you don't need to sign-up. HOWEVER, if your citations look more like the bad & ugly OR if you can't tell the difference between the two lists, then you need to sign up.
In this brief introduction to RefWorks, you'll learn how to find and save references while doing your research, how to organize references once they're in RefWorks, and how to cite those references in your writing.