|   | by Dr. Kerry Johnson MBA PhDPaperback details (USA). details (UK). details (Germany). details (Canada). ISBN: 978-1-7225-0178-5 ISBN-10: 1-7225-0178-2 G&D Media · 17. September 2019 | 
| See also (possibly by other authors): | ||
| 1988 | Hardcover | Peak Performance Selling: How to Increase Your Sales by 70% in Six Weeks | 
| 1988 | Paperback | Peak Performance Selling: How to Increase Your Sales By 70% in Six Weeks |