APA-referens (7:e uppl.)

GETIS, A., GETIS, J., BJELLAND, M., & FELLMANN, J. D. (2011). Introduction to geography. McGraw-Hill Book Company.

Chicago-referens (17:e uppl.)

GETIS, Arthur, Judith GETIS, Mark BJELLAND, och Jerome D. FELLMANN. Introduction to Geography. McGraw-Hill Book Company, 2011.

MLA-referens (9:e uppl.)

GETIS, Arthur, et al. Introduction to Geography. McGraw-Hill Book Company, 2011.