Cita APA (7th ed.)
De Blij, H. J., & Muller, P. O. (1997). Geography: Realms, regions, and concepts (8th ed.). J. Wiley.
Cita Chicago (17th ed.)
De Blij, Harm J., i Peter O. Muller. Geography: Realms, Regions, and Concepts. 8th ed. New York: J. Wiley, 1997.
Cita MLA (9th ed.)
De Blij, Harm J., i Peter O. Muller. Geography: Realms, Regions, and Concepts. 8th ed. J. Wiley, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.