APA (7th ed.) Citation

Maughan, E. K., & Roberts, A. E. (1967). Big Snowy and Amsden Groups and the Mississippian-Pennsylvanian boundary in Montana. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Maughan, Edwin K., and Albert Eugene Roberts. Big Snowy and Amsden Groups and the Mississippian-Pennsylvanian Boundary in Montana. Washington: U.S. Govt. Print. Off, 1967.

MLA (9th ed.) Citation

Maughan, Edwin K., and Albert Eugene Roberts. Big Snowy and Amsden Groups and the Mississippian-Pennsylvanian Boundary in Montana. U.S. Govt. Print. Off, 1967.