APA (7th ed.) Zitazioa

TWIDALE, C. (1976). Analysis of landforms. John Wiley.

Chicago Style (17th ed.) Zitazioa

TWIDALE, C.R. Analysis of Landforms. Sydney: John Wiley, 1976.

MLA (9th ed.) Zitazioa

TWIDALE, C.R. Analysis of Landforms. John Wiley, 1976.