Não informado. (1961). Society of Petroleum Engineers Journal. Society of Petroleum Engineers.
Chicago-Zitierstil (17. Ausg.)Não informado. Society of Petroleum Engineers Journal. Dallas, Tex: Society of Petroleum Engineers, 1961.
MLA-Zitierstil (8. Ausg.)Não informado. Society of Petroleum Engineers Journal. Society of Petroleum Engineers, 1961.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.