You were closer to the truth, Wile E--Mormons use the standard King James version of the Bible, which I am pretty sure is the most common version of the Bible in Christian religions. Correct me if I'm wrong on that. They read out of it at least as much as they do the Book of Mormon. In fact, the subtitle of the Book of Mormon is "Another Testament of Jesus Christ" to emphasize the fact that the Bible is absolutely central to their beliefs, as well. I don't know about JW, though, Lebell is probably right on that one.
/used to be Mormon