Not really sure about ref's for dragons, you'll probably have to draw them yourself... If you're not that much of a pencil artist, I'd suggest finding a picture of a dragon you like and see of you can draw som ortho's of it, instead of having to come up with a design yourself...
OR you could check out Kurt's dragon tut, I'm sure that references are included...
Liter is French for 'Gimme some ****ing cola before I break vous ****ing lips!"