APA (7th ed.) Citation

De Blij, H. J., & Muller, P. O. (1992). Geography regions and concepts (6th ed., rev.). Wiley.

Chicago Style (17th ed.) Citation

De Blij, Harm J., and Peter O. Muller. Geography Regions and Concepts. 6th ed., rev. New York: Wiley, 1992.

MLA (9th ed.) Citation

De Blij, Harm J., and Peter O. Muller. Geography Regions and Concepts. 6th ed., rev. Wiley, 1992.