Perkins, D. (1966). The evolution of American foreign policy (2nd ed.). Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerkins, Dexter. The Evolution of American Foreign Policy. 2nd ed. New York: Oxford University Press, 1966.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPerkins, Dexter. The Evolution of American Foreign Policy. 2nd ed. Oxford University Press, 1966.
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