Não informado. (1941). Crop Production. Department of Agriculture, Statistical Reporting Service.
Style de citation Chicago (17e éd.)Não informado. Crop Production. Washington: Department of Agriculture, Statistical Reporting Service, 1941.
Style de citation MLA (8e éd.)Não informado. Crop Production. Department of Agriculture, Statistical Reporting Service, 1941.
Attention : ces citations peuvent ne pas être correctes à 100%.