APA (7th ed.) Citation

Dunbar, C. O. (1960). Historical geology (2nd ed.). Wiley.

Chicago Style (17th ed.) Citation

Dunbar, Carl O. Historical Geology. 2nd ed. New York: Wiley, 1960.

MLA (9th ed.) Citation

Dunbar, Carl O. Historical Geology. 2nd ed. Wiley, 1960.