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.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)South Dakota State College of Agriculture and Mechanic Arts. Economics Department và South Dakota Agricultural Experiment Station. Agricultural Economics Pamphlet. Brookings, S.D.: Dept. of Agricultural Economics, Agricultural Experiment Station, South Dakota State College, 1942.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)South Dakota State College of Agriculture and Mechanic Arts. Economics Department và South Dakota Agricultural Experiment Station. Agricultural Economics Pamphlet. Dept. of Agricultural Economics, Agricultural Experiment Station, South Dakota State College, 1942.