MLA citation help please?

I have two different text books for one cl and they are both anthologies with the works of many different authors. I am writing a paper about Aristotle's Nicomachean Ethics... half of which is in one book and the other half is in the other book... so I have to cite them both. But, when you cite a work from an anthology your in-text citation is the name of the author of the work... not the editor of the anthology. So... for either book it will just be (Aristotle + page number). It doesn't seem right that the citation will be exactly the same for either book. How will they know what book it came from? Does it matter?