Johnson, S. Y., Chan, M. A., & Konopka, E. A. (1992). Pennsylvanian and Early Permian paleogeography of the Uinta-Piceance Basin region, northwestern Colorado and northeastern Utah. United States Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Johnson, Samuel Y., Marjorie A. Chan, und Edith A. Konopka. Pennsylvanian and Early Permian Paleogeography of the Uinta-Piceance Basin Region, Northwestern Colorado and Northeastern Utah. [Washington, DC]: United States Gov. Print. Off, 1992.
MLA-Zitierstil (9. Ausg.)Johnson, Samuel Y., et al. Pennsylvanian and Early Permian Paleogeography of the Uinta-Piceance Basin Region, Northwestern Colorado and Northeastern Utah. United States Gov. Print. Off, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.