Trebek, Alex, 1940-, The Jeopardy! challenge : the toughest games from America's greatest quiz show! ; featuring the teen tournament, the college tournament, the seniors tournament, the tournament of champions, HarperPerennial, 1992, ISBN 0-06-096935-0, OCLC25410559 [dostęp 2019-05-09]. Brak numerów stron w książce