Wanek, A. A. (1959). Geology and fuel resources of the Mesa Verde Area Montezuma and La Plata Counties, Colorado. United States Government Print. Off.
Chicago-Zitierstil (17. Ausg.)Wanek, Alexander A. Geology and Fuel Resources of the Mesa Verde Area Montezuma and La Plata Counties, Colorado. Washington: United States Government Print. Off, 1959.
MLA-Zitierstil (9. Ausg.)Wanek, Alexander A. Geology and Fuel Resources of the Mesa Verde Area Montezuma and La Plata Counties, Colorado. United States Government Print. Off, 1959.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.