Não informado. The Mountain Geologist. Rocky Mountain Association of Geologists.
Chicago-Zitierstil (17. Ausg.)Não informado. The Mountain Geologist. Denver, Colo: Rocky Mountain Association of Geologists.
MLA-Zitierstil (8. Ausg.)Não informado. The Mountain Geologist. Rocky Mountain Association of Geologists.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.