Cita APA

Getis, A., Getis, J., & Fellmann, J. D. (2009). Introduction to geography (12th ed.). McGraw-Hill.

Citación estilo Chicago

Getis, Arthur, Judith Getis, and Jerome D. Fellmann. Introduction to Geography. 12th ed. Dubuque, IA: McGraw-Hill, 2009.

Cita MLA

Getis, Arthur, et al. Introduction to Geography. 12th ed. McGraw-Hill, 2009.