Não informado. (1975). Chilton's oil and gas energy. Chilton Book.
Chicago-Zitierstil (17. Ausg.)Não informado. Chilton's Oil and Gas Energy. Radnor, Pa: Chilton Book, 1975.
MLA-Zitierstil (8. Ausg.)Não informado. Chilton's Oil and Gas Energy. Chilton Book, 1975.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.