Não informado. (1937). Tobacco situation. U.S. Department of Agriculture, Agricultural Marketing Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Tobacco Situation. Washington: U.S. Department of Agriculture, Agricultural Marketing Service, 1937.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Tobacco Situation. U.S. Department of Agriculture, Agricultural Marketing Service, 1937.
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