by Stephen R. Covey
by Darren Hardy
by Bachi J. Karkaria
by Paul-Loup Sulitzer
by John Kenneth Galbraith
by Malcom Gladwell
by Blake Masters
by Napoleon Hill
by Peter Guber
by Jay Elliot
by Thomas J. Watson JR
by Dale Carnegie
by Dale Carnegi
by Norman Vincent Peale
by Rod Judkins
by Kenichi Ohmae
by Mark manson
by David Schwartz
