Artstor is a digital image library, providing access to over 2.4 million high-quality images for research and teaching.
You can find works of art from museums and galleries around in the world in Artstor.
Here is a basic keyword search:
Click on an image to open up the information and a closer look *in order to download and print, you must register for an account*:
These criteria can help you evaluate any materials, not just websites.
(If "CRAAP" is too silly for you, try "PARCA".)
Chicago Style is the required citation style used in the Department of Visual Arts.