Cita APA

Thornbury, W. D. n. 1., & Thornbury, W. D. n. 1. (1965). Regional geomorphology of the United States. New York, New York: Willey.

Citación estilo Chicago

Thornbury, William David n. 1900, y William David n. 1900 Thornbury. Regional Geomorphology of the United States. New York, New York: Willey, 1965.

Cita MLA

Thornbury, William David n. 1900, y William David n. 1900 Thornbury. Regional Geomorphology of the United States. New York, New York: Willey, 1965.