| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Plus 10 Percent Principle: How to Get Extraordinary Results from Ordinary People | 978-O-89384-221-5 (O-89384-221-4) | 1993 |
B Richardson · Barrie Rickards · Barry Richards · Barry Richardson · Barry Richert · Bera Ryszard