APA (7th ed.) Citation

Swanson, R. W. (1973). Geology and phosphate deposits of the Permian rocks in central western Montana. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Swanson, Roger Warren. Geology and Phosphate Deposits of the Permian Rocks in Central Western Montana. Washington: United States Department of the Interior, Geological Survey, 1973.

MLA (9th ed.) Citation

Swanson, Roger Warren. Geology and Phosphate Deposits of the Permian Rocks in Central Western Montana. United States Department of the Interior, Geological Survey, 1973.