"The Ballot or The Bullet (Detroit Version)". Malcolm X's speech at a meeting sponsored by the Congress for Racial Equality in Detroit, Michigan, April 12, 1964.
Sen. Arlen Specter, Charles Robbins (2012). “Life Among the Cannibals: A Political Career, a Tea Party Uprising, and the End of Governing As We Know It”, p.240, Macmillan