Graham Green. The Lost Childhood in The Lost Childhood and Other Essays. London: Eyre & Spottiswoode, 1951.
Donald E. Knuth. The IBM 650: An Appreciation from the Field. Annals of the History of Computing, 8 (1), 1986.
Werner Heisenberg. Physics and Philosophy, London: George Allen and Unwin, 1959, p. 58.
Douglas Adams, Mostly Harmless, New York: Harmony Books, 1992, p. 135.
William James. The Sentiment of Rationality. Mind. Series 1, Volume 4, 1879, p. 320.
P. R. Wakeling, Of Optics and Opticists, Applied Optics, 7 (1):19, 1968. (Quote attributed to British Admiralty Regulations.)
John Gall, Systemantics: How Systems Work and How They Fail. New York: ...