Citazione Stile APA (7a Edizione)

Christopherson, R. W. (2009). Landforms: Geosystems : an introduction to physical geography ([Seventh edition], Second Custom Edition fot the University of Memphis, Department of Earth Sciences.). Custom Publishing.

Citazione stile Chigago Style (17a edizione)

Christopherson, Robert W. Landforms: Geosystems : An Introduction to Physical Geography. [Seventh edition], Second Custom Edition fot the University of Memphis, Department of Earth Sciences. New York: Custom Publishing, 2009.

Citatione MLA (9a ed.)

Christopherson, Robert W. Landforms: Geosystems : An Introduction to Physical Geography. [Seventh edition], Second Custom Edition fot the University of Memphis, Department of Earth Sciences. Custom Publishing, 2009.