I know this is coming a bit late and I know this is a bit off topic, but I had this question specifically concerning citing Kindle or iPad ebooks in MLA format. I have students using their Kindles and iPads and this question has come up quite often. I asked a professor about how to cite those editions in MLA and more specifically about the reference locations. He was unsure about the reference locations (and said he would check on it), but this was the response I was given by Dr. Jim Harner about citing them in MLA and I thought I would share it: