South Dakota State College of Agriculture and Mechanic Arts. Economics Department & South Dakota Agricultural Experiment Station. (1942). Agricultural economics pamphlet. Dept. of Agricultural Economics, Agricultural Experiment Station, South Dakota State College.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSouth Dakota State College of Agriculture and Mechanic Arts. Economics Department और South Dakota Agricultural Experiment Station. Agricultural Economics Pamphlet. Brookings, S.D.: Dept. of Agricultural Economics, Agricultural Experiment Station, South Dakota State College, 1942.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSouth Dakota State College of Agriculture and Mechanic Arts. Economics Department और South Dakota Agricultural Experiment Station. Agricultural Economics Pamphlet. Dept. of Agricultural Economics, Agricultural Experiment Station, South Dakota State College, 1942.