APA (7 वां संस्करण) प्रशस्ति पत्र

Não informado. (1931). Cotton situation. U.S. Department of Agriculture, Bureau of Agricultural Economics.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Não informado. Cotton Situation. Washington: U.S. Department of Agriculture, Bureau of Agricultural Economics, 1931.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Não informado. Cotton Situation. U.S. Department of Agriculture, Bureau of Agricultural Economics, 1931.

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