Odyssey & Greek Mythology
Encyclopedia Britannica Online includes articles, media, images, and related links to outside sources. Searching each of the levels may provide different information, images, etc. MLA citation information is also provided.
Greek Mythology Link includes character biographies, places, mythological topics, and images.
Theoi Greek Mythology, exploring Mythology in Classical Literature & Art is an excellent source. It provides numerous images of Greek art.
Don't forget to cite your sources.
For electronic citations, review this site for information and samples:
MLA: Electronic Sources, Purdue University