Não informado. (1947). Livestock and meat situation. U.S. Department of Agriculture, Agricultural Marketing Service.
Citação do estilo Chicago (17ª ed.)Não informado. Livestock and Meat Situation. Washington: U.S. Department of Agriculture, Agricultural Marketing Service, 1947.
Citação MLA (8ª ed.)Não informado. Livestock and Meat Situation. U.S. Department of Agriculture, Agricultural Marketing Service, 1947.
Atenció: Aquestes cites poden no estar 100% correctes.