APA (7th ed.) Citation

Jensen, F. S., & Varnes, H. D. (1964). Geology of the Fort Peck Area, Garfield, McCone and Valley Counties, Montana. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Jensen, Fred S., and Helen Dowling Varnes. Geology of the Fort Peck Area, Garfield, McCone and Valley Counties, Montana. Washington: U.S. Govt. Print. Off, 1964.

MLA (9th ed.) Citation

Jensen, Fred S., and Helen Dowling Varnes. Geology of the Fort Peck Area, Garfield, McCone and Valley Counties, Montana. U.S. Govt. Print. Off, 1964.