ハルポクラテス
↑ Dale Kinney, "Spolia from the Baths of Caracalla in Sta. Maria in Trastevere" The Art Bulletin 68.3 (September 1986:379-397, "Isis and Serapis in medieval mythography" p. 391 note 73.
↑ "Egyptian Mythology", Geraldine Pinch, p. 147, Oxford University Press US, 2004, ISBN 0195170245
↑ Marx, Harpo; Rowland Barber (1988). Harpo Speaks!. New York, NY: Limelight Editions. ISBN 0879100362