here's a pretty informative page about web pertaining laws.
http://fairuse.stanford.edu/Copyrigh...er6/index.html
if i were you i would get permission, credit doesn't seem to cut it, while there is a chance to plead the "fair use" law, this is kind of a grey area and i would not put much faith in it if i were you. especially if this is going to be commercial.
/em "farts in a tornado"
