Não informado. (1967). Abstracts. Weed Science Society of America.
Chicagoスタイル(17版)引用形式Não informado. Abstracts. Champaign, Ill: Weed Science Society of America, 1967.
MLA(8版)引用形式Não informado. Abstracts. Weed Science Society of America, 1967.
警告: この引用は必ずしも正確ではありません.