APA (7e ed.) Bronvermelding

Pettyjohn, W. A. (1967). Geological Survey Geohydrology of the Souris River valley in the vicinity of Monot, North Dakota. Washington: United States Government Printing Office.

Chicago (17e ed.) Bronvermelding

Pettyjohn, Wayne A. Geological Survey Geohydrology of the Souris River Valley in the Vicinity of Monot, North Dakota. Washington: United States Government Printing Office, 1967.

MLA (9e ed.) Bronvermelding

Pettyjohn, Wayne A. Geological Survey Geohydrology of the Souris River Valley in the Vicinity of Monot, North Dakota. Washington: United States Government Printing Office, 1967.