APA (7th ed.) Citation

Dunbar, C. O. (1960). Historical geology (2ª ed.). John Wiley and Sons.

Chicago Style (17th ed.) Citation

Dunbar, Carl O. Historical Geology. 2ª ed. New York: John Wiley and Sons, 1960.

MLA (9th ed.) Citation

Dunbar, Carl O. Historical Geology. 2ª ed. John Wiley and Sons, 1960.