Howell, W. G., & Brent, D. M. (2013). Thinking about the presidency: The primacy of power. Princeton University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHowell, William G., और David Milton Brent. Thinking About the Presidency: The Primacy of Power. Princeton: Princeton University Press, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHowell, William G., और David Milton Brent. Thinking About the Presidency: The Primacy of Power. Princeton University Press, 2013.
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