Não informado. (1935). Iowa farm economist. Iowa State College of Agriculture and Mechanic Arts.
Chicago-Zitierstil (17. Ausg.)Não informado. Iowa Farm Economist. Ames, Iowa: Iowa State College of Agriculture and Mechanic Arts, 1935.
MLA-Zitierstil (8. Ausg.)Não informado. Iowa Farm Economist. Iowa State College of Agriculture and Mechanic Arts, 1935.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.