In interdisciplinary fields such as Classics, resources in many different subject areas will be useful. To find printed reference material relevant to your topic, start with Worldcat@SU online catalog.
To find reference materials, search using keywords to describe your topic along with types of reference works (i.e. "classics handbook"). You can also check the library's Web pages for subject guides for specific topics to find other suggested sources.
Below are a few titles to get you started. To check call number and location information, search the Worldcat@SU online catalog.
Image of 'Aphrodite, called Venus de Milo' courtesy of ARTstor
Barrington Atlas of the Greek and Roman World by 
Greek and Latin Authors by 
The Oxford Companion to Classical Literature by 
The Oxford Classical Dictionary by 
Brill's New Pauly: Encyclopedia of the Ancient World by 
The Oxford History of the Classical World by