APA (7th ed.) Citation

De Blij, H. J., & Muller, P. O. (1991). Geography : regions and concepts / H.J. De Blij, Peter O. Muller: Regions and concepts (6th ed.). Wiley.

Chicago Style (17th ed.) Citation

De Blij, Harm J., and Peter O. Muller. Geography : Regions and Concepts / H.J. De Blij, Peter O. Muller: Regions and Concepts. 6th ed. New York ; Chichester: Wiley, 1991.

MLA (9th ed.) Citation

De Blij, Harm J., and Peter O. Muller. Geography : Regions and Concepts / H.J. De Blij, Peter O. Muller: Regions and Concepts. 6th ed. Wiley, 1991.

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