Bücher
Hörbücher
Erfolgreiche Verkaufsabschlüsse für Dummies
2008
Selling in Tough Times: Secrets to Selling When No One Is Buying (Unabridged)
2010
The Gentle Art of Persuasion: Made for Success
2015
The Certifiable Salesperson : The Ultimate Guide to Help Any Salesperson Go Crazy with Unprecedented Sales!
2008
The Art of Recruiting (Original Recording)
2020
When Buyers Say No
2014