APA (7th ed.) Citation

Thornburry, W. D. (1969). Principles of geomorphology. Wiley.

Chicago Style (17th ed.) Citation

Thornburry, William David. Principles of Geomorphology. New York: Wiley, 1969.

MLA (9th ed.) Citation

Thornburry, William David. Principles of Geomorphology. Wiley, 1969.