Παραπομπή APA

Sen, D. (1975). Basic principles of geopolitics and history, thoeretical aspect of international ralations. Concept Publishing.

Παραπομπή Chicago Style

Sen, Debabrata. Basic Principles of Geopolitics and History, Thoeretical Aspect of International Ralations. Delhi: Concept Publishing, 1975.

Παραπομπή MLA

Sen, Debabrata. Basic Principles of Geopolitics and History, Thoeretical Aspect of International Ralations. Concept Publishing, 1975.