Não informado. (1957). Foreign agriculture circular. U.S. Department of Agriculture, Foreign Agricultural Service.
Chicagoスタイル(17版)引用形式Não informado. Foreign Agriculture Circular. Washington: U.S. Department of Agriculture, Foreign Agricultural Service, 1957.
MLA(8版)引用形式Não informado. Foreign Agriculture Circular. U.S. Department of Agriculture, Foreign Agricultural Service, 1957.
警告: この引用は必ずしも正確ではありません.