1. Daniel Bell:The Coming of the Post Industrial Society, Basic Books, Inc., Hapen Colophono Books, New York, NY, 1973.
2. Norman Podhoretz:Harvard Business Review, March–April, 1981, vol. 59, no. 2, pp. 96–106.
3. John McClenahen:Industry Week, June 13, 1983, vol. 217, no. 6, p. 37.
4. Cyril Stanley Smith:From Art to Science, MIT Press, Cambridge, MA, 1980, pp. 23–27.
5. Eric Hoffer:First Things, Last Things, Harper and Row, New York, NY, 1967, pp. 8–9.