APA (7th ed.) Citation

Clark, T. H., & Stearn, C. W. (1968). The geological evolution of North America: A regional approach to historical geology. Ronald Press Co.

Chicago Style (17th ed.) Citation

Clark, Thomas Henry, and Colin William Stearn. The Geological Evolution of North America: A Regional Approach to Historical Geology. New York: Ronald Press Co, 1968.

MLA (9th ed.) Citation

Clark, Thomas Henry, and Colin William Stearn. The Geological Evolution of North America: A Regional Approach to Historical Geology. Ronald Press Co, 1968.