Cita APA (7th ed.)

Christopherson, R. W. (2006). Geosystems: An introduction to Physical Geography (Vol.1 Canadian edition.). Prentice Hall.

Cita Chicago (17th ed.)

Christopherson, Robert W. Geosystems: An Introduction to Physical Geography. Vol.1 Canadian edition. Ontario: Prentice Hall, 2006.

Cita MLA (9th ed.)

Christopherson, Robert W. Geosystems: An Introduction to Physical Geography. Vol.1 Canadian edition. Prentice Hall, 2006.