Não informado. (1894). Circular. U.S. Department of Agriculture, Bureau of Animal Industry.
Chicagoスタイル(17版)引用形式Não informado. Circular. Washington: U.S. Department of Agriculture, Bureau of Animal Industry, 1894.
MLA(8版)引用形式Não informado. Circular. U.S. Department of Agriculture, Bureau of Animal Industry, 1894.
警告: この引用は必ずしも正確ではありません.