caption: Unknown photographer, Old English. From Various Authors. (2013). Goat Farming - A Comprehensive Guide to Breeding, Health, Feeding, Products and Many Other Important Aspects of Goat Farming. Read Books Ltd. in the public domain.
Goat Farming - A Comprehensive Guide to Breeding, Health, Feeding, Products and Many Other Important Aspects of Goat Farming. (2013). Redditch, UK: Read Books Ltd.
Porter, V., & Mason, I. L. (2002). Mason’s World Dictionary of Livestock Breeds, Types and Varieties (5th ed.). Wallingford, Oxfordshire, UK: CABI Publishing.