Blunt 1976, pp.  17 "The Tower of London: Discover The Wild Beasts That Once Roamed The Royal Menagerie". www.hrp.org.uk.
2017년 7월 21일에 확인함.  Blunt 1976, 17쪽 “The Tower of London: Discover The Wild Beasts That Once Roamed The Royal Menagerie”. 《www.hrp.org.uk》.