APA ציטוט

Clark, T. H., & Stearn, C. W. (1943). The Geological Evolution of North America: A Regional Approach to Historical Geology. New York: The Ronald Press.

Trích dẫn kiểu Chicago

Clark, Thomas H., và Colin W. Stearn. The Geological Evolution of North America: A Regional Approach to Historical Geology. New York: The Ronald Press, 1943.

ציטוט MLA

Clark, Thomas H., và Colin W. Stearn. The Geological Evolution of North America: A Regional Approach to Historical Geology. New York: The Ronald Press, 1943.