Não informado. (2001). Western oil and refining. Palmer Publications.
Chicagoスタイル(17版)引用形式Não informado. Western Oil and Refining. Los Angeles, Calif: Palmer Publications, 2001.
MLA(8版)引用形式Não informado. Western Oil and Refining. Palmer Publications, 2001.
警告: この引用は必ずしも正確ではありません.