Cunliffe, Juliette (2004). "Coat Types, Colors and Markings". The Encyclopedia of Dog Breeds. Paragon Publishing. m/s. 20–23 and various. ISBN0-7525-8276-3.
Fogle, Bruce (2000). "The Breed Section Explained". The New Encyclopedia of the Dog. Dorling Kindersley. m/s. 83 and various. ISBN0-7513-0471-9.
