Não informado. (2002). Cattle Practice. British Cattle Veterinary Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Cattle Practice. Gloucestershire, Inglaterra: British Cattle Veterinary Association, 2002.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Cattle Practice. British Cattle Veterinary Association, 2002.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.