Walter Lippmann, Clinton Rossiter, James Lare (1982). “The Essential Lippmann: A Political Philosophy for Liberal Democracy”, p.233, Harvard University Press
Albert Einstein (2013). “Einstein on Politics: His Private Thoughts and Public Stands on Nationalism, Zionism, War, Peace, and the Bomb”, p.227, Princeton University Press
George Washington, Andrew Jackson (1862). “Washington's Farewell Address: The Proclamation of Jackson Against Nullification, and the Declaration of Independence”, p.8