Não informado. (2002). Beef Cattle Report. University of Nebraska, Institute of Agricultural and Natural Resources.
Chicago-Zitierstil (17. Ausg.)Não informado. Beef Cattle Report. Lincoln, Neb: University of Nebraska, Institute of Agricultural and Natural Resources, 2002.
MLA-Zitierstil (8. Ausg.)Não informado. Beef Cattle Report. University of Nebraska, Institute of Agricultural and Natural Resources, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.