Iowa State College. Agricultural Extension Dept. (1921). Agricultural extension bulletin. The Dept..
Chicagoスタイル(17版)引用形式Iowa State College. Agricultural Extension Dept. Agricultural Extension Bulletin. Ames, Iowa: The Dept., 1921.
MLA(8版)引用形式Iowa State College. Agricultural Extension Dept. Agricultural Extension Bulletin. The Dept., 1921.
警告: この引用は必ずしも正確ではありません.