APA (7th ed.) Citation

De Blij, H. J., & Muller, P. O. (1988). Geography: Regions and concepts (5th ed.). Wiley.

Chicago Style (17th ed.) Citation

De Blij, Harm J., and Peter O. Muller. Geography: Regions and Concepts. 5th ed. New York: Wiley, 1988.

MLA (9th ed.) Citation

De Blij, Harm J., and Peter O. Muller. Geography: Regions and Concepts. 5th ed. Wiley, 1988.