אנג'לס ZODIAC 1986 LETTER הצעות לפתרון "צופן הסלבריטאי" S¿ren Roest Korsgaard, America's Jack The Ripper: TheCrimes and Psychology of theZodiac Killer:
Newton, Michael; The Encyclopedia Of Serial Killers: A Study Of The Chilling Criminal Phenomenon From The Angels Of Death To TheZodiac Killer; Checkmark