The History Channel
Crash Course: Greek and Roman Pantheons
A note on Website Quality: The sites that are of decent quality can be clunky to use, and some of the ones that are easy to use/navigate have lesser quality for advanced research. There are many websites with names that are variations of "greek-gods.net" or "greekgods.com", etc. that mostly regurgitate the same content (often from wikipedia), and many of these sites really exist to get you to look at advertising. Don't judge a website by its name.
Clilck here for a Greek Gods and Goddesses print resource list in the Library Catalog
Note: Many of these books are already on a cart for you to use.
The Dewey Decimal Number for Greek Mythology is 292.13 .
Search for your God or Goddess, or look at this general article on Greek Mythology.
Search for your God or Goddess
Gale Student Resources in Context has a full Topic page about "Greek Mythology", which includes reference book articles and more.