Não informado. (2009). International Gas Engineering and Management. Institution of Gas Engineers.
Chicago-Zitierstil (17. Ausg.)Não informado. International Gas Engineering and Management. London: Institution of Gas Engineers, 2009.
MLA-Zitierstil (8. Ausg.)Não informado. International Gas Engineering and Management. Institution of Gas Engineers, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.