Albert Einstein, Stephen W. Hawking (2007). “A Stubbornly Persistent Illusion: The Essential Scientific Works of Albert Einstein”, p.337, Running Press
Peter Marshall (1949). “Prayers Offered by the Chaplain, the Rev. Peter Marshall, D.D.: At the Opening of the Daily Sessions of the Senate of the United States During the Eightieth and Eighty-first Congress 1947-1949”
John von Neumann's remarks as keynote speaker at the first national meeting of the Association for Computing Machinery (1947) as quoted in "Archaeology of computers: Reminiscences, 1945-1947" by Franz L. Alt, Communications of the ACM, Volume 15, Issue 7, special issue: Twenty-fifth anniversary of the Association for Computing Machinery (p. 694), July 1972.