When in doubt, always check with your professor.
Send your professor an email, or see if you can ask your professor after class.
If you cannot get a hold of your professor, ask your Liaison Librarian, or a librarian from Reese Library's Ask a Librarian service.
The librarian can review the assignment description you have, and can at least point you to the direction of quality resources for your research topic, until you hear back from your professor.
As seen in the brief definition, an annotated Bibliography can include any credible source, like a book, a website, a journal article, a report, a film, and so on. Furthermore, an annotated bibliography may be either descriptive or evaluative.
Check your assignment requirements to verify the following. If in doubt, check with your instructor regarding the: