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.
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