Citazione APA

De Blij, H. J., & Muller, P. O. (1993). Physical geography of the global environment. Wiley.

Stile di citazione Chicago

De Blij, Harm J., e Peter O. Muller. Physical Geography of the Global Environment. New York: Wiley, 1993.

Citazione MLA

De Blij, Harm J., e Peter O. Muller. Physical Geography of the Global Environment. Wiley, 1993.