Não informado. (1980). International Petrochemical Developments. Rickian.
Chicagoスタイル(17版)引用形式Não informado. International Petrochemical Developments. Palm Beach, Fla: Rickian, 1980.
MLA(8版)引用形式Não informado. International Petrochemical Developments. Rickian, 1980.
警告: この引用は必ずしも正確ではありません.