| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Earning What You're Worth?: The Psychology of Sales Call Reluctance | 978-0-935907-03-2 | 1991 | George W. Dudley |
| The Psychology of Call Reluctance | 978-0-935907-02-5 | 1991 | " |
| The Psychology of Sales Call Reluctance: Earning What You're Worth in Sales | 978-0-935907-12-4 | 2007 | " |
| The Psychology of Sales Call Reluctance: Earning What You're Worth in Sales | 978-0-935907-07-0 | 1999 | " |