Não informado. (1937). Foreign agriculture. U.S. Department of Agriculture, Foreign Agricultural Service.
Chicagoスタイル(17版)引用形式Não informado. Foreign Agriculture. Washington: U.S. Department of Agriculture, Foreign Agricultural Service, 1937.
MLA(8版)引用形式Não informado. Foreign Agriculture. U.S. Department of Agriculture, Foreign Agricultural Service, 1937.
警告: この引用は必ずしも正確ではありません.