Não informado. (1931). Cotton situation. U.S. Department of Agriculture, Bureau of Agricultural Economics.
Style de citation Chicago (17e éd.)Não informado. Cotton Situation. Washington: U.S. Department of Agriculture, Bureau of Agricultural Economics, 1931.
Style de citation MLA (8e éd.)Não informado. Cotton Situation. U.S. Department of Agriculture, Bureau of Agricultural Economics, 1931.
Attention : ces citations peuvent ne pas être correctes à 100%.