Gaya APA

Chorley, R, J. (2006). The history of the study of landforms or the development of geomorphology the life and work of William Morris Davis . New York: Rough Routledge.

Gaya MLA

Chorley, Richard, J.. "The history of the study of landforms or the development of geomorphology the life and work of William Morris Davis". New York: Rough Routledge, 2006. Text.