Does the Bible Endorse Slavery? Paul Viggiano addresses the question here and Paul Copan and Greg Koukl talk about it here.
“‘Who Created God?’ The question presumes that God was created, but no one believes that, certainly not Christians, so this is not a question any theist has to answer. An eternal, self-existent being has no beginning, so he needs no creator. This doesn’t prove such a being exists, of course. it only shows that those who believe in God do not have to answer inappropriate question about his origins.” – Greg Koukl
Every Credo Course audio download is free until Christmas. Check out the courses here.