(en) Tomasz Dobrogoszcz, Nobody Expects the Spanish Inquisition: Cultural Contexts in Monty Python, Londres, Rowman & Littlefield, (lire en ligne), p. 66.
(en) Geoff Surratt, Ten Stupid Things That Keep Churches from Growing: How Leaders Can Overcome Costly Mistakes, Grand Rapids, Zondervan, (lire en ligne), p. 98.
(en) Kevin J. Harty, The Holy Grail on Film: Essays on the Cinematic Quest, Jefferson, McFarland, (lire en ligne), p. 89.