APA (7th ed.) Citation

De Blij, H. J., & Muller, P. O. (1985). Geography: Regions and concepts. John Wiley.

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.