Cita APA (7th ed.)

THORNBURY, W. D. (1958). Principles of geomorphology. John Wiley and Sons.

Cita Chicago (17th ed.)

THORNBURY, William D. Principles of Geomorphology. London: John Wiley and Sons, 1958.

Cita MLA (9th ed.)

THORNBURY, William D. Principles of Geomorphology. John Wiley and Sons, 1958.