Não informado. (1937). Tobacco situation. U.S. Department of Agriculture, Agricultural Marketing Service.
Citação do estilo Chicago (17ª ed.)Não informado. Tobacco Situation. Washington: U.S. Department of Agriculture, Agricultural Marketing Service, 1937.
Citação MLA (8ª ed.)Não informado. Tobacco Situation. U.S. Department of Agriculture, Agricultural Marketing Service, 1937.
警告：这些引文格式不一定是100％准确.
