Cita APA (7a ed.)

Muller, P. O., Hames, E. M., & De Blij, H. J. (1997). Study guide, de Blij and Muller's 'Geography: Realms, regions and concepts' (8th ed.). Wiley.

Cita Chicago Style (17a ed.)

Muller, Peter O., Elizabeth Muller Hames, y Harm J. De Blij. Study Guide, De Blij and Muller's 'Geography: Realms, Regions and Concepts'. 8th ed. New York ; Chichester: Wiley, 1997.

Cita MLA (8a ed.)

Muller, Peter O., et al. Study Guide, De Blij and Muller's 'Geography: Realms, Regions and Concepts'. 8th ed. Wiley, 1997.