Παραπομπή APA

Thornbury, W. D. (1954). Principles of geamorphology. (2nd ed.). Wiley Eastern.

Παραπομπή Chicago Style

Thornbury, William D. Principles of Geamorphology. 2nd ed. New Delhi: Wiley Eastern, 1954.

Παραπομπή MLA

Thornbury, William D. Principles of Geamorphology. 2nd ed. Wiley Eastern, 1954.