APA (7th ed.) Citation

Thompson, G. R., & Turk, J. (1991). Modern physical geology. Saunders.

Chicago Style (17th ed.) Citation

Thompson, Graham R., and Jon Turk. Modern Physical Geology. Philadelphia u.a: Saunders, 1991.

MLA (9th ed.) Citation

Thompson, Graham R., and Jon Turk. Modern Physical Geology. Saunders, 1991.