Não informado. (2018). Petroleum Equipment and Services. Associated Publishers.
Chicago-Zitierstil (17. Ausg.)Não informado. Petroleum Equipment and Services. Dallas, Tex: Associated Publishers, 2018.
MLA-Zitierstil (8. Ausg.)Não informado. Petroleum Equipment and Services. Associated Publishers, 2018.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.