| title | ISBN-13 | year of publication | |
|---|---|---|---|
| Auftreten ohne Lampenfieber: Reden, Interviews, Fernsehauftritte, Konferenzen | 978-3-593-34327-3 | 1992 | |
| Make the Most of Your Best: A Complete Program for Presenting Yourself and Your Ideas With Confidence and Authority | 978-0-03-062376-9 | 1983 | |
| Never Be Nervous Again | 978-0-8041-0417-3 | 1989 | |
| Speech Can Change Your Life | 978-0-440-18199-6 | 1971 |
Campus Verlag · Dell · Holt McDougal · Random House