Cavendish, Richard, "Man, Myth & Magic: An Illustrated Encyclopedia of the Supernatural (vol. 3)", New York: Marshall Cavendish Corp. (1970); pg. 312Diarkibkan 2020-02-23 di Wayback Machine. Accessed 13 August 2007.
Cavendish, Richard, "Man, Myth & Magic: An Illustrated Encyclopedia of the Supernatural (vol. 3)", New York: Marshall Cavendish Corp. (1970); pg. 312Diarkibkan 2020-02-23 di Wayback Machine. Accessed 13 August 2007.