H.G. · H. Gabriel · H.W. · W G
| title | ISBN-13 | year of publication |
|---|---|---|
| Comment dominer et influencer les autres: NULL | 978-2-89044-533-8 | 1994 |
| Twenty Steps to Power, Influence, and Control Over People | 978-0-13-934976-8 | 1986 |
| Twenty Steps to Power, Influence, and Control over People | 978-0-13-934950-8 | 1962 |
| Twenty steps to power, influence and control over people. | 978-0-13-935122-8 | 1962 |