Howell, W. G., & Brent, D. M. (2013). Thinking about the presidency: The primacy of power. Princeton University Press.
芝加哥风格引文Howell, William G., 与 David Milton Brent. Thinking About the Presidency: The Primacy of Power. Princeton: Princeton University Press, 2013.
MLA引文Howell, William G., 与 David Milton Brent. Thinking About the Presidency: The Primacy of Power. Princeton University Press, 2013.
警告：这些引文格式不一定是100％准确.