The “insanity is doing the same thing over and over” etc. quote seems to have been current in alcohol/substance addiction programs in 1980 at least, and presumably in the 1970s; I’ve added another book (apparently originally printed 1980, but Google books has 1992 revised edition so I can’t be sure) that refers to oral use. I’m not sure we can definitively date it (presuming it was in oral use), so the attribution specifically to Narcotics Anonymous (as originator) may be over-stating matters, but these seem (among?) the earliest written versions. Please feel free to add earlier ones if possible!