I also think some historical reference to Plato and the notion that knowledge is belief plus logos?, or reasons, found in the Thaetetus?, would be helpful here.
Anyway, I just wanted to put you on notice that I'm planning to radically alter the rest of this text, so that it only explains one view -- the normative internalist view of justification. I think that's fair, since that is how the term is generally used. I think we can and should cover other views, but that we ought to do it on other pages.
If you have objections to this, please let me know, so I don't waste my time writing something you are going to delete out of hand. MRC