GranthamW.C.PattonR.W.YorkT.D.WinickM.L.Computer Applications in Health Fitness Management: A Comprehensive Resource for Managing and Operating Programs and Facilities, Human Kinetics: Champaign, IL, 1998.
5.
GatesW.H., Business @ the Speed of Thought, Warner Books: New York, NY1999.
6.
NaisbittJ., Megatrends Ten New Directions Transforming Our Lives, Warner Books, 1982.
7.
NaisbittJ., High Tech – High Touch, William and Morrow, Inc., 2000.
8.
PfaffenbergerB., Discover the Internet. IDG Books Worldwide: Foster City, CA1997.