Wallace D. Wattles
Great Britain.
William Buchan M.D.
Stephen King
B. K. S. Iyengar
Leon G. Schiffman
Nancy L. Mace
McGraw-Hill
Michael R. Solomon
James F. Balch
Clayton M. Christensen
Richard H. Thaler
Gilbert A. Churchill
James F. Engel
Marty Cagan
Shoshana Zuboff
United States. General Accounting Office
Nir Eyal
Robert B. Cialdini
Eric Ries