Não informado. (1980). Solutions. National Fertilizer Solutions Association.
Chicagoスタイル(17版)引用形式Não informado. Solutions. Peoria, Ill: National Fertilizer Solutions Association, 1980.
MLA(8版)引用形式Não informado. Solutions. National Fertilizer Solutions Association, 1980.
警告: この引用は必ずしも正確ではありません.