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.
Chicago-referens (17:e uppl.)South Dakota State College of Agriculture and Mechanic Arts. Economics Department och South Dakota Agricultural Experiment Station. Agricultural Economics Pamphlet. Brookings, S.D.: Dept. of Agricultural Economics, Agricultural Experiment Station, South Dakota State College, 1942.
MLA-referens (8:e uppl.)South Dakota State College of Agriculture and Mechanic Arts. Economics Department och South Dakota Agricultural Experiment Station. Agricultural Economics Pamphlet. Dept. of Agricultural Economics, Agricultural Experiment Station, South Dakota State College, 1942.