APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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