Παραπομπή APA

Cohen, S. B. (2009). Geopolitics: The geography of international relations (2nd ed.). Rowman & Littlefield.

Παραπομπή Chicago Style

Cohen, Saul Bernard. Geopolitics: The Geography of International Relations. 2nd ed. Lanham, Md.: Rowman & Littlefield, 2009.

Παραπομπή MLA

Cohen, Saul Bernard. Geopolitics: The Geography of International Relations. 2nd ed. Rowman & Littlefield, 2009.