Não informado. (1969). American beef producer. American National Livestock Association.
Chicagoスタイル(17版)引用形式Não informado. American Beef Producer. Denver, Colo: American National Livestock Association, 1969.
MLA(8版)引用形式Não informado. American Beef Producer. American National Livestock Association, 1969.
警告: この引用は必ずしも正確ではありません.