Παραπομπή APA

Thorn, C. E. (1988). Introduction to theoretical geomorphology. Unwin hyman.

Παραπομπή Chicago Style

Thorn, Colin E. Introduction to Theoretical Geomorphology. Boston: Unwin hyman, 1988.

Παραπομπή MLA

Thorn, Colin E. Introduction to Theoretical Geomorphology. Unwin hyman, 1988.