APA (7th ed.) Citation

Cobban, W. A. (1976). Type sections and stratigraphy of the members of the Blackleaf and Marias River Formations (Cretaceous) of the Sweetgrass arch, Montana. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Cobban, William A. Type Sections and Stratigraphy of the Members of the Blackleaf and Marias River Formations (Cretaceous) of the Sweetgrass Arch, Montana. Washington: United States Department of the Interior, Geological Survey, 1976.

MLA (9th ed.) Citation

Cobban, William A. Type Sections and Stratigraphy of the Members of the Blackleaf and Marias River Formations (Cretaceous) of the Sweetgrass Arch, Montana. United States Department of the Interior, Geological Survey, 1976.