Não informado. (2002). FDA Veterinarian. Food and Drug Administration, Center for Veterinary Medicine.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. FDA Veterinarian. Rockville, Md: Food and Drug Administration, Center for Veterinary Medicine, 2002.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. FDA Veterinarian. Food and Drug Administration, Center for Veterinary Medicine, 2002.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.