Não informado. (1919). Journal of Farm Economics. American Farm Economic Association.
Chicagoスタイル(17版)引用形式Não informado. Journal of Farm Economics. Menasha, Wis: American Farm Economic Association, 1919.
MLA(8版)引用形式Não informado. Journal of Farm Economics. American Farm Economic Association, 1919.
警告: この引用は必ずしも正確ではありません.