Cita APA (7th ed.)

Christopherson, R. W. (2014). Geosystems: An introduction to physical geography (Eight edition, Pearson New International edition.). Pearson Education Limited.

Cita Chicago (17th ed.)

Christopherson, Robert W. Geosystems: An Introduction to Physical Geography. Eight edition, Pearson New International edition. Harlow Essex, England: Pearson Education Limited, 2014.

Cita MLA (9th ed.)

Christopherson, Robert W. Geosystems: An Introduction to Physical Geography. Eight edition, Pearson New International edition. Pearson Education Limited, 2014.