Não informado. (2020). Progress in Cattle & Sheep Practice. American Veterinary Publications.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Progress in Cattle & Sheep Practice. Wheaton, Ill: American Veterinary Publications, 2020.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Progress in Cattle & Sheep Practice. American Veterinary Publications, 2020.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.