It has been a while since I wrote a bibliography, so for my last answer I had to look up how they should be formatted. I wonder if this can be built into the editor for this site? Should I be referencing Google Books in the link? Is there a more authoritative source?
I think that might be a bit more formal than necessary. If you want to do a standard reference, than by all means do so, but I think the title of the work and a link if online or just the author if not online would be fine too. I think requiring a bibliographic reference is kind of formal for the idea of the QA system.