Cita APA (7th ed.)

Christopherson, R. W. (2006). Geosystems (Custom edition for Georgia State University.). Pearson Custom Publishing.

Cita Chicago (17th ed.)

Christopherson, Robert W. Geosystems. Custom edition for Georgia State University. Boston, Ma: Pearson Custom Publishing, 2006.

Cita MLA (9th ed.)

Christopherson, Robert W. Geosystems. Custom edition for Georgia State University. Pearson Custom Publishing, 2006.