Board Thread:General Discussion/@comment-4928331-20130206013126/@comment-4928331-20130209022012

And here is the list of creator credits:

Note 1: Joseph Certa was not credited in Episodes 1 & 2. He was briefly credited as Joe Certa in early S1 episodes

Note 2: Murphy Anderson received credits for Zatanna only in Satisfaction. Although his name appears on Greg's documents for other episodes, it doesn't happen on-screen.