| title | ISBN-13 | year of publication |
|---|---|---|
| Etkili Konusma | 978-975-316-180-0 | 2004 |
| How To Be an Effective Speaker | 978-0-8442-3280-5 | 1990 |
| Speak For Yourself: How to give persuasive presentations and entertaining talks - with confidence | 978-0-7499-2593-2 | 2005 |
| Sztuka przemawiania i prezentacji | 978-83-05-13466-8 | 2006 |
Książka i Wiedza · McGraw-Hill · Piatkus