APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Dunbar, Carl O. Historical Geology. 2. ed. New York [u.a.]: Wiley, 1960.

MLA (9th ed.) Citation

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