Cita APA (7a ed.)

Christopherson, R. W. (2012). Geosystems: An introduction to physical geography (8th ed.). Prentice Hall.

Cita Chicago Style (17a ed.)

Christopherson, Robert W. Geosystems: An Introduction to Physical Geography. 8th ed. Boston: Prentice Hall, 2012.

Cita MLA (9a ed.)

Christopherson, Robert W. Geosystems: An Introduction to Physical Geography. 8th ed. Prentice Hall, 2012.