Não informado. (2001). Service and regulatory announcements. U.S. Department of Agriculture, Bureau of Animal Industry.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Service and Regulatory Announcements. Washington: U.S. Department of Agriculture, Bureau of Animal Industry, 2001.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Service and Regulatory Announcements. U.S. Department of Agriculture, Bureau of Animal Industry, 2001.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.