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.
Citação do estilo Chicago (17ª ed.)South Dakota State College of Agriculture and Mechanic Arts. Economics Department e South Dakota Agricultural Experiment Station. Agricultural Economics Pamphlet. Brookings, S.D.: Dept. of Agricultural Economics, Agricultural Experiment Station, South Dakota State College, 1942.
Citação MLA (8ª ed.)South Dakota State College of Agriculture and Mechanic Arts. Economics Department e South Dakota Agricultural Experiment Station. Agricultural Economics Pamphlet. Dept. of Agricultural Economics, Agricultural Experiment Station, South Dakota State College, 1942.