APA (7th ed.) Zitazioa

Allen, P. A. (1997). Earth surface processesses. Blackwell.

Chicago Style (17th ed.) Zitazioa

Allen, Philip A. Earth Surface Processesses. London: Blackwell, 1997.

MLA (9th ed.) Zitazioa

Allen, Philip A. Earth Surface Processesses. Blackwell, 1997.