Credits of my game

I believe he just wants to know how to give credit to the person who created the spritesheets he is using in his hack or w/e, and there are some I guess that do not have an author. Yeah, giving credit in a Readme is a legit way to credit the person. That, and just never claim as your own, if someone asks. That's cool you really want to give credit where credit is due. Crediting them in the Readme if you are making a hack is the best one could really do.