The University library has a wealth of materials regarding film and film criticism. When using the online catalog to search for movies, use "Feature films" as your search term and choose the "Subject" field. You can locate books on film criticism by searching "Film criticism" and selecting the "Subject" field.
This page from Berkeley offers comprehensive guidance on how to cite films and other media in your bibliography.
The Purdue Owl site provides clear and thorough citation guidance.
These databases contain publications focused on film studies or containing some amount of film criticism. A subject search for "film criticism" makes a good starting point; add other terms. eg "Ford, John" in additional rows to narrow your topic.