Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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