Não informado. (1953). World agricultural situation. U.S. Department of Agriculture, Economic Research Service.
Style de citation Chicago (17e éd.)Não informado. World Agricultural Situation. Washington: U.S. Department of Agriculture, Economic Research Service, 1953.
Style de citation MLA (8e éd.)Não informado. World Agricultural Situation. U.S. Department of Agriculture, Economic Research Service, 1953.
Attention : ces citations peuvent ne pas être correctes à 100%.