Não informado. (1972). Journal of agronomic education. American Society of Agronomy.
Chicagoスタイル(17版)引用形式Não informado. Journal of Agronomic Education. Madison, Wis: American Society of Agronomy, 1972.
MLA(8版)引用形式Não informado. Journal of Agronomic Education. American Society of Agronomy, 1972.
警告: この引用は必ずしも正確ではありません.