APA (7th ed.) Zitazioa

Gregory, K. J., & Lewin John. (2014). The basics of geomorphology: Key concepts (1a. ed.). Sage.

Chicago Style (17th ed.) Zitazioa

Gregory, Kenneth J., eta Lewin John. The Basics of Geomorphology: Key Concepts. 1a. ed. Londres: Sage, 2014.

MLA (9th ed.) Zitazioa

Gregory, Kenneth J., eta Lewin John. The Basics of Geomorphology: Key Concepts. 1a. ed. Sage, 2014.