APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (9. izdanje)

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