Cita APA

Thornbury, W. D. n. 1., & Thornbury, W. D. n. 1. (1969). Principles of geomorphology (2. edition --.). New York, New York: J. Wiley.

Citación estilo Chicago

Thornbury, William David n. 1900, y William David n. 1900 Thornbury. Principles of Geomorphology. 2. edition --. New York, New York: J. Wiley, 1969.

Cita MLA

Thornbury, William David n. 1900, y William David n. 1900 Thornbury. Principles of Geomorphology. 2. edition --. New York, New York: J. Wiley, 1969.