APA (7th ed.) Citation

O, D. C. (1963). Historical geology. John Wiley & Sons.

Chicago Style (17th ed.) Citation

O, DUNBAR. Carl. Historical Geology. John Wiley & Sons, 1963.

MLA (8th ed.) Citation

O, DUNBAR. Carl. Historical Geology. John Wiley & Sons, 1963.

Warning: These citations may not always be 100% accurate.