"Happy Birthday, John Cage! Celebrate What Would Be The Composer’s 101st With His Little-Seen Visual Art" by Kate Abbey-Lambertz, www.huffingtonpost.com. September 5, 2013.
Speech at Amherst College, Amherst, Massachusetts, on October 26, 1963. "Public Papers of the Presidents of the United States: John F. Kennedy", p. 817, 1963.