Burchett, M. (1996). Polar bear, in: Waller, G. et al.Sealife: a complete guide to the marine environment. pp. 434
In: Waller, G.; Burchett, M.; Dando, M. (1996). Sealife: A complete guide to the marine environment. Pica Press: Robertsbridge. ISBN 1-873403-26-7. 56 plates, 504 pp., meer
