ChaiD.X.“Future of Leisure: A Delphi Application”, Research Quarterly.48(3): October, 1977.
2.
GrahamP.J.“The Changing College Student: New Directions for Intramural-Recreational Sports Programs”, Theoretical and Operational Aspects of Intramural Sports.SattlerT.P., GrahamP.J., and BaileyD.C. (editors), West Point, New York: Leisure Press, 1978, p. 9–18.
3.
HelmerO.“Analysis of the Future of the Delphi Method”, Rand Corporation Monograph #P3558. Santa Monica, California: 1967.
4.
HelmerO.“The Use of Delphi Technique in Problems of Educational Innovations”, Rand Corporation Monograph #P3499. Santa Monica, California: 1966.
5.
HyattR.W.Intramural Sports: Organization and Administration.The C.V. Mosly Company, 1977.
6.
LewinA.Y.Policy Sciences: Methodologies and Cases.Elmsford, New York: Pergamon Press, 1976.
7.
SessomsH.D.Leisure Services: The Organized Recreation and Park System.Englewood Cliffs, New Jersey: Prentice Hall Inc., 1975.