Não informado. (2001). Western oil and refining. Palmer Publications.
Style de citation Chicago (17e éd.)Não informado. Western Oil and Refining. Los Angeles, Calif: Palmer Publications, 2001.
Style de citation MLA (8e éd.)Não informado. Western Oil and Refining. Palmer Publications, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.