Não informado. (2001). Bulletin. Iowa Agricultural and Home Economics Experiment Station.
Chicagoスタイル(17版)引用形式Não informado. Bulletin. Ames, Iowa: Iowa Agricultural and Home Economics Experiment Station, 2001.
MLA(8版)引用形式Não informado. Bulletin. Iowa Agricultural and Home Economics Experiment Station, 2001.
警告: この引用は必ずしも正確ではありません.