APA (7th ed.) Citation

Getis, A., Getis, J., & Fellmann, J. D. (1981). Geography. Macmillan.

Chicago Style (17th ed.) Citation

Getis, Arthur, Judith Getis, and Jerome Donald Fellmann. Geography. New York, NY: Macmillan, 1981.

MLA (9th ed.) Citation

Getis, Arthur, et al. Geography. Macmillan, 1981.