Brecht, A. (1949). Political theory: The foundations of twentieth century political thought. Princeton University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBrecht, Arnold. Political Theory: The Foundations of Twentieth Century Political Thought. Princeton, N. J: Princeton University Press, 1949.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBrecht, Arnold. Political Theory: The Foundations of Twentieth Century Political Thought. Princeton University Press, 1949.
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