Não informado. (2002). Cattle Practice. British Cattle Veterinary Association.
Chicago-Zitierstil (17. Ausg.)Não informado. Cattle Practice. Gloucestershire, Inglaterra: British Cattle Veterinary Association, 2002.
MLA-Zitierstil (8. Ausg.)Não informado. Cattle Practice. British Cattle Veterinary Association, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.