Citazione Stile APA (7a Edizione)

De Blij, H. J., & Muller, P. O. (2006). Geography: Realms, regions, and concepts (12th ed.). Wiley.

Citazione stile Chigago Style (17a edizione)

De Blij, Harm J., e Peter O. Muller. Geography: Realms, Regions, and Concepts. 12th ed. New York: Wiley, 2006.

Citatione MLA (9a ed.)

De Blij, Harm J., e Peter O. Muller. Geography: Realms, Regions, and Concepts. 12th ed. Wiley, 2006.