APA (7 वां संस्करण) प्रशस्ति पत्र
Lieber, R. J. (2012). Power and willpower in the American future: Why the United States is not destined to decline. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Lieber, Robert J. Power and Willpower in the American Future: Why the United States Is Not Destined to Decline. New York: Cambridge University Press, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Lieber, Robert J. Power and Willpower in the American Future: Why the United States Is Not Destined to Decline. Cambridge University Press, 2012.
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