APA (7th ed.) Citation

Glassner, M. I., & De Blij, H. J. (1989). Systematic political geography (4th ed.). Wiley.

Chicago Style (17th ed.) Citation

Glassner, Martin Ira, and Harm J. De Blij. Systematic Political Geography. 4th ed. New York: Wiley, 1989.

MLA (8th ed.) Citation

Glassner, Martin Ira, and Harm J. De Blij. Systematic Political Geography. 4th ed. Wiley, 1989.