Authors
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| Nickname | Name | Country | Action |
|---|---|---|---|
| Morten T. Hansen | Morten T. Hansen | Browse Items | |
| Peter Ferdinand Drucker | Peter Ferdinand Drucker | Browse Items | |
| Robert B. Cialdini | Robert B. Cialdini | Browse Items | |
| Robert Fritz | Robert Fritz | Browse Items | |
| Robert I. Sutton | Robert I. Sutton | Browse Items | |
| Ruth Sherman | Ruth Sherman | Browse Items | |
| SIMON SINEK | SIMON SINEK | Browse Items | |
| SPENCER JOHNSON | SPENCER JOHNSON | Browse Items | |
| Stephen J. Dubner | Stephen J. Dubner | Browse Items | |
| Stephen R. Covey | Stephen R. Covey | Browse Items | |
| Steven D. Levitt | Steven D. Levitt | Browse Items | |
| Zig Ziglar | Zig Ziglar | Browse Items |