Não informado. (1953). World agricultural situation. U.S. Department of Agriculture, Economic Research Service.
Cita Chicago Style (17a ed.)Não informado. World Agricultural Situation. Washington: U.S. Department of Agriculture, Economic Research Service, 1953.
Cita MLA (8a ed.)Não informado. World Agricultural Situation. U.S. Department of Agriculture, Economic Research Service, 1953.
Precaución: Estas citas no son 100% exactas.