Parker, G. (1985). Western geopolitical thought in the twentieth century. Croom Helm.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रParker, Geoffrey. Western Geopolitical Thought in the Twentieth Century. Croom Helm, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रParker, Geoffrey. Western Geopolitical Thought in the Twentieth Century. Croom Helm, 1985.
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