Cattle, and Pigs. North Adams, Massachusetts: Storey Publishing. ISBN 9781603420372. Valerie Porter, Lawrence Alderson, Stephen J.G. Hall, D. Phillip Sponenberg...
Pigs: 163 Breeds from Common to Rare. Storey Publishing. p. 150. ISBN 978-1-60342-037-2. "Angora Goats history". Daisyshillfarm.com. Archived from the original...