Can you quote yourself?
I’m working through a book right now (yes, I’m going to post something real one of these days) in which an author placed an unattributed quotation in the middle of a paragraph which was obviously intended to give support for his argument (a rather weak argument by the way). When I flipped to the end of the chapter to check the notes, I almost fell out of my seat. He was quoting himself from an article on the same subject! Isn’t that a little misleading? Shouldn’t you at least say something like, “As I stated elsewhere…”? This is one of the reasons I hate end notes.