And I got a rather unexpected reply from Dale to my above posted comment. O.o
"Citations in a movie? That seems awfully awkward to me. It seems like a movie like this should just be to inspire you to learn more and do your own research. Papers and books should have citations. This movie was almost a direct response to Super-size Me. How did you feel about the citations of that movie?"
To which I just responded: "@Dale: Whoa, wasn’t expecting you to respond.

You simply put them in the end, if need be along with the credits, simple. They could even be verbal citations, not necessarily text citations within the movie’s body (which I agree would be a tad awkward).
Yeah, I’m aware that it’s a response to Super-Size Me which had it’s own serious problems being a documentary.
I’d have to watch Super-Size Me again as it’s been ages since I’ve seen it, but if memory serves, they were better with spoken citations, though it was still riddled with it’s own problems…(e.g. lack of controls, lack of mention of gov’t influence on obesity)
Though you do make a good point about the inspire you to learn more and do your own research deal.
And I am an anarchist, just for the record."
I do believe I've understated his intelligence once again. My bad.