APA
Chorley R. J., Schumm S. A. & Sugden D. E. (1984). Geomorphology. New York: Methuen.
Chicago
Chorley Richard J, Schumm Stanley A and Sugden David E. 1984. Geomorphology. New York: Methuen.
Harvard
Chorley R. J., Schumm S. A. and Sugden D. E. (1984). Geomorphology. New York: Methuen.
MLA
Chorley Richard J, Schumm Stanley A and Sugden David E. Geomorphology. New York: Methuen. 1984.
