A.T. Kearney, Inc. 1988. Countdown to the Future: The Manufacturing Engineer in the 21st Century. Dearborn, Mich.: Society of Manufacturing Engineers.
Dalkey, N.C. 1969. The Delphi Method: An Experimental Study of Group Opinion. Memorandum RM-5888 PR. Santa Monica, Calif.: Rand Corporation.
Glaser, B.G., and A.L. Strauss. 1967. The Discovery of Grounded Theory. Chicago, Ill.: Aldine.
Linstone, H.A., and M. Turoff (eds). 1975. The Delphi Method: Techniques and Applications. Reading, Mass.: Addison-Wesley.
Ziglio, E. 1996. The Delphi Method and its Contribution to Decision-Making. Pp. 3–33 in Gazing into the Oracle: The Delphi Method and Its Application to Social Policy and Public Health. M. Adler and E. Ziglio, eds. London: Jessica Kingsley Publishers.