Não informado. (1948). Speculum. Ohio State University, College of Veterinary Medicine.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Speculum. Columbus, Ohio: Ohio State University, College of Veterinary Medicine, 1948.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Speculum. Ohio State University, College of Veterinary Medicine, 1948.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.