Citazione APA

De Blij, H., & Muller, P. O. (2004). Geography: Realms, regions and concepts (11th ed.). John Wiley.

Stile di citazione Chicago

De Blij, H.J, e Peter O. Muller. Geography: Realms, Regions and Concepts. 11th ed. New Jersey: John Wiley, 2004.

Citazione MLA

De Blij, H.J, e Peter O. Muller. Geography: Realms, Regions and Concepts. 11th ed. John Wiley, 2004.