APA (7th ed.) Citation

De Blij, H. J., & Muller, P. O. (1985). Geography: Regions and concepts / Harm J. de Blij, Peter O. Muller (2nd ed.). John Wiley.

Chicago Style (17th ed.) Citation

De Blij, Harm J., and Peter O. Muller. Geography: Regions and Concepts / Harm J. De Blij, Peter O. Muller. 2nd ed. New York: John Wiley, 1985.

MLA (9th ed.) Citation

De Blij, Harm J., and Peter O. Muller. Geography: Regions and Concepts / Harm J. De Blij, Peter O. Muller. 2nd ed. John Wiley, 1985.