APA (7th ed.) Citation

Gill, J. R., & Cobban, W. A. (1965). Stratigraphy of the Pierre Shale, Valley City and Pembina Mountain areas, North Dakota. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Gill, James R., and William A. Cobban. Stratigraphy of the Pierre Shale, Valley City and Pembina Mountain Areas, North Dakota. Washington: U.S. Govt. Print. Off, 1965.

MLA (9th ed.) Citation

Gill, James R., and William A. Cobban. Stratigraphy of the Pierre Shale, Valley City and Pembina Mountain Areas, North Dakota. U.S. Govt. Print. Off, 1965.