Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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