APA (7th ed.) Citation

Becker, H. F. (1961). Oligocene plants from the Upper Ruby River Basin, southwestern Montana. Geological Society of America.

Chicago Style (17th ed.) Citation

Becker, Herman Frederick. Oligocene Plants from the Upper Ruby River Basin, Southwestern Montana. New York: Geological Society of America, 1961.

MLA (9th ed.) Citation

Becker, Herman Frederick. Oligocene Plants from the Upper Ruby River Basin, Southwestern Montana. Geological Society of America, 1961.