Não informado. (1968). Weed Science. Weed Science Society of America.
Chicagoスタイル(17版)引用形式Não informado. Weed Science. Champaign, Ill: Weed Science Society of America, 1968.
MLA(8版)引用形式Não informado. Weed Science. Weed Science Society of America, 1968.
警告: この引用は必ずしも正確ではありません.