Cita APA (7th ed.)

Howell, W. G., & Brent, D. M. (2013). Thinking about the presidency: The primacy of power. Princeton University Press.

Cita Chicago (17th ed.)

Howell, William G., i David Milton Brent. Thinking About the Presidency: The Primacy of Power. Princeton: Princeton University Press, 2013.

Cita MLA (9th ed.)

Howell, William G., i David Milton Brent. Thinking About the Presidency: The Primacy of Power. Princeton University Press, 2013.