Não informado. (2001). Swine Health and Production. American Association of Swine Practitioners.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Swine Health and Production. Bloomington, Ind: American Association of Swine Practitioners, 2001.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Swine Health and Production. American Association of Swine Practitioners, 2001.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.