The way I learned that this was a phoney is that I got CAUGHT using it by a MILITARY GUY who since became a history prof, teaching military history was reviewing my mansuscript section on WW II, and HE HAD THE SOURCES.
I think Morison's Naval history of WW II correctly cites this. I'm almost certain Gordon Prange's books, "At Dawn We Slept" and "Pearl Harbor: the Verdict of History" discuss this mis-quotation.