Bibliographic managers can help with this task. The most common products (supported by Princeton) are Zotero, EndNote, Mendeley and RefWorks.
The library offers workshops for those interested to learn how to use Zotero, RefWorks or EndNote. Check the schedule to register for a session.
LaTex Users: All bibliographic managers will export your references as a .bib file, however Mendeley includes additional LaTex integrations.