APA (7th ed.) Citation

Thornbury, W. D. (1954). Principles of geomorphology. Wiley.

Chicago Style (17th ed.) Citation

Thornbury, William D. Principles of Geomorphology. New York: Wiley, 1954.

MLA (9th ed.) Citation

Thornbury, William D. Principles of Geomorphology. Wiley, 1954.

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