Não informado. (1941). Crop Production. Department of Agriculture, Statistical Reporting Service.
Chicagoスタイル(17版)引用形式Não informado. Crop Production. Washington: Department of Agriculture, Statistical Reporting Service, 1941.
MLA(8版)引用形式Não informado. Crop Production. Department of Agriculture, Statistical Reporting Service, 1941.
警告: この引用は必ずしも正確ではありません.