1. Jeffrey H. Gitomer
. The Sales Bible: the ultimate sales resource. William Morrow and Company. Inc, 1994.2. Jeffrey H. Gitomer
. Customer Satisfaction Is Worthless. Customer Loyalty Is Priceless. Bard Press. 1998.3. William K. Gallagher, Orvel Ray Wilson, Jay Conrad Levinson.
Guerilla Selling: unconventional weapons and tactics for making the sale. Houghton Mifflin Company. 1992.4. Nancy J. Stephens with Bob Adams
. Customer-Focused Selling. Adams Media Corporation. 1998.5. Tom Hopkins
. Selling for Dummies. IDG Books Worldwide. Inc, 1995.7. Brian Tracy
. Advanced Selling Strategies. Fireside. 1996.8. Mario Ohoven. Die Magie des Power-Selling. Verlag Moderne Industrie Landsberg/Lech. 1994.
9. Zig Ziglar
. Ziglar On Selling. Oliver-Nelson Books. 1991.10. Zig Ziglar
. Secrets Of Closing The Sale. Berkley Book. 1985.