Não informado. (2002). Beef Cattle Report. University of Nebraska, Institute of Agricultural and Natural Resources.
Citação do estilo Chicago (17ª ed.)Não informado. Beef Cattle Report. Lincoln, Neb: University of Nebraska, Institute of Agricultural and Natural Resources, 2002.
Citação MLA (8ª ed.)Não informado. Beef Cattle Report. University of Nebraska, Institute of Agricultural and Natural Resources, 2002.
警告：這些引文格式不一定是100％准確.