| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Stop Acting Like a Seller and Start Thinking Like a Buyer: Improve Sales Effectiveness by Helping Customers Buy | 978-0-470-06834-2 | 2007 | Wally Wood |
| The Relationship Edge in Business: Connecting with Customers and Colleagues When It Counts | 978-0-471-47712-9 | 2004 | " |
| The Relationship Edge: The Key to Strategic Influence and Selling Success | 978-0-470-91547-9 | 2011 | " |
| The Relationship Edge: The Key to Strategic Influence and Selling Success | 978-0-470-06833-5 | 2006 | " |