APA (7th ed.) Citation

Lopez, D. A. (1995). Geology of the Sweet Grass Hills, north-central Montana. Montana Bureau of Mines and Geology.

Chicago Style (17th ed.) Citation

Lopez, David A. Geology of the Sweet Grass Hills, North-central Montana. Butte, Mont.: Montana Bureau of Mines and Geology, 1995.

MLA (9th ed.) Citation

Lopez, David A. Geology of the Sweet Grass Hills, North-central Montana. Montana Bureau of Mines and Geology, 1995.