Albert Einstein (2013). “Einstein on Politics: His Private Thoughts and Public Stands on Nationalism, Zionism, War, Peace, and the Bomb”, p.230, Princeton University Press
Franklin D. Roosevelt's campaign address on the Federal Budget in Pittsburgh, Pennsylvania (October 19, 1932), as quoted in "The Public Papers and Addresses of Franklin D. Roosevelt, 1928-1932" (p. 809), 1938.