| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1994 | 978-0-9631550-1-6 | Jacques Werth · Nicholas E. Ruben | High Probability Selling: Re-Invents the Selling Process |
| 1997 | 978-0-9631550-3-0 | Jacques Werth · Nicholas E. Ruben | High Probability Selling: Re-Invents the Selling Process |
| 1998 | 978-0-9631550-5-4 | Jacques Werth | High Probability Selling |