Walter Lippmann, Clinton Rossiter, James Lare (1982). “The Essential Lippmann: A Political Philosophy for Liberal Democracy”, p.77, Harvard University Press
John C. Maxwell (2011). “The Maxwell Daily Reader: 365 Days of Insight to Develop the Leader Within You and Influence Those Around You”, p.25, Thomas Nelson Inc
Alexander Hamilton, Donald R. Hickey, Connie D. Clark (2006). “Citizen Hamilton: The Wit and Wisdom of an American Founder”, p.100, Rowman & Littlefield