Não informado. (1935). Iowa farm economist. Iowa State College of Agriculture and Mechanic Arts.
Chicagoスタイル(17版)引用形式Não informado. Iowa Farm Economist. Ames, Iowa: Iowa State College of Agriculture and Mechanic Arts, 1935.
MLA(8版)引用形式Não informado. Iowa Farm Economist. Iowa State College of Agriculture and Mechanic Arts, 1935.
警告: この引用は必ずしも正確ではありません.