I think you mean MLA, not mlm.
we have to cite references(on the reference page)that were not used in the main paper. A
Usually, the prof tells you not to include publications on the ref list if they are not cited in the material.
Spell cite with a c.
No, he does not have to cite it. I have read a lot of books, but I only list the one's I cited in the paper. It's simple, really!
You make your contribution, and in doing so you reference others' work. When you reference others, obviously it is necessary to include the publication info in a list.
I have heard about some instances when using Chicago style and writing about philosophy, etc., people might list a lot of sources that are not specifically mentioned... it just depends on the purpose. But in APA, no... just list what you cite.
I think you should let the person cite whomever he wants to cite. If there is a disagreement, make a little note of it and the prof will enjoy the opportunity to explain. Open up to receive what the team members give, and go the extra mile, because that is how to open up the flood gates of energy. Your team member may be blocked... just open yourself up and write something. ;-)