Cita APA

De Blij, H. J. (1973). Systematic political geography. New York: J. Wiley & Sons.

Citación estilo Chicago

De Blij, Harm J. Systematic Political Geography. New York: J. Wiley & Sons, 1973.

Cita MLA

De Blij, Harm J. Systematic Political Geography. New York: J. Wiley & Sons, 1973.