Boyan, Lee, Successful Cold Call Selling
, New York: American Management Association, 1989.
Canfield, Jack, The Success Principles,
New York: Doubleday Books, 2005.
Ferrazzi, Keith, Never Eat Alone,
New York: A Currency Book, Published by Doubleday. 2005
Gratzon, Fred, The Lazy Way to Success
, Iowa: Soma Press, 2003.
Hopkins, Tom, How to Master the Art of Selling
, Arizona: Published by Champion Press, 1980.
Holden, Jim, Power Base Selling
, Illinois: John Wiley & Sons, 1990.
Hunter, Scott, Making Work Work
, Irvine: Greenleaf Book Group, 2004.
Maxwell, John, Failing Forward
, Tennessee: Thomas Nelson Publishers, 2000.
McNamara, Don, Visionary Sales Leadership
, Laguna Niguel: published by BaMaW Publishing, 2005.