Stephan Schiffman
The 250 Power Words That Sell
The Words You Need to Get the Sale, Beat Your Quota, and Boost Your Commission
Adams Media, 2013
El vendedor de profesión
Aumente su motivación y ambición, no importa qué edad tenga
Adams Media, 2009
Sales Don't Just Happen
26 Proven Strategies to Increase Sales in Any Market
Kaplan Publishing, 2002
Getting to Closed
A Proven Program to Accelerate the Sales Cycle and Increase Commissions
Kaplan Publishing, 2002
