Não informado. (2008). Journal of Swine Health and Production. American Association of Swine Veterinarians.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Journal of Swine Health and Production. Perry, Iowa: American Association of Swine Veterinarians, 2008.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Journal of Swine Health and Production. American Association of Swine Veterinarians, 2008.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.