There are several different online tools, including EndNote basic, Zotero, Papers, and Mendeley, that help manage references, generate citations and bibliographies, annotate, and store the documents associated with the references such as pdf and word files and web pages. These typically have a somewhat steep learning curve and are not very useful for papers and reports with just a few citations.
Not sure which citation manager to use? We've created a handy comparison chart to help you decide.
The University Library offers help and instruction on the following reference managers. Feel free to contact the librarian for your subject area, or submit your question to the portal