APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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