Cita APA (7th ed.)

Getis, A., Bjelland, M. D., & Getis, V. (2014). Introduction to geography (Fourteenth edition.). McGraw-Hill Education.

Cita Chicago (17th ed.)

Getis, Arthur, Mark D. Bjelland, i Victoria Getis. Introduction to Geography. Fourteenth edition. New York, N.Y: McGraw-Hill Education, 2014.

Cita MLA (9th ed.)

Getis, Arthur, et al. Introduction to Geography. Fourteenth edition. McGraw-Hill Education, 2014.