Downey, J. S., & Dinwiddie, G. A. (1988). The regional aquifer system underlying the northern Great Plains in parts of Montana, North Dakota, South Dakota, and Wyoming: Summary. United States Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Downey, Joe S., und George A. Dinwiddie. The Regional Aquifer System Underlying the Northern Great Plains in Parts of Montana, North Dakota, South Dakota, and Wyoming: Summary. Washington: United States Gov. Print. Off, 1988.
MLA-Zitierstil (9. Ausg.)Downey, Joe S., und George A. Dinwiddie. The Regional Aquifer System Underlying the Northern Great Plains in Parts of Montana, North Dakota, South Dakota, and Wyoming: Summary. United States Gov. Print. Off, 1988.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.