APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

De Blij, Harm J., and Peter O. Muller. Geography, Regions and Concepts. 6th ed. New York [u.a.]: Wiley, 1991.

MLA (9th ed.) Citation

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