Não informado. (2004). Refining engineer. Petroleum Engineer Publishing.
Chicago-referens (17:e uppl.)Não informado. Refining Engineer. Dallas, Tex: Petroleum Engineer Publishing, 2004.
MLA-referens (8:e uppl.)Não informado. Refining Engineer. Petroleum Engineer Publishing, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.