Apollo – The International Art Magazine
The Art Story
ARTnews
Hyperallergic - Sensitive to Art & its Discontents
Khan Academy: Art History
Metropolitan Museum of Art Heilbrunn Timeline
The Tate (London) Discover Art/Artists Directory
These links will help you to create a bibliography:
Purdue Owl - Chicago Manual of Style Author Date Sample Paper
Purdue Owl - Modern Language Association Sample Paper