Não informado. (1999). Rocky Mountain Geology. University of Wyoming, Department of Geology and Geophysics.
Chicago-Zitierstil (17. Ausg.)Não informado. Rocky Mountain Geology. Laramie, Wyo: University of Wyoming, Department of Geology and Geophysics, 1999.
MLA-Zitierstil (8. Ausg.)Não informado. Rocky Mountain Geology. University of Wyoming, Department of Geology and Geophysics, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.