How to cite a source for my research paper?

Okay so I have a book that has excerpts of court cases, particularly landmark cases, in it. When I am typing my paper, I am usually quoting or paraphrasing the case opinions (made by the justice[s]). When citing the source, should I say the book author, title, and page # or should I cite the court case? The problem is not the fact that one is secondary and one is primary, its just that I'm not sure how I would cite a court case.