Não informado. (1923). Farm economics. Cornell University, New York State College of Agriculture.
Chicagoスタイル(17版)引用形式Não informado. Farm Economics. Ithaca, NY: Cornell University, New York State College of Agriculture, 1923.
MLA(8版)引用形式Não informado. Farm Economics. Cornell University, New York State College of Agriculture, 1923.
警告: この引用は必ずしも正確ではありません.