Alder Harry Beryl Heather · Beryl Heather Alder Harry · Harry Alder Beryl Heather
| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| 21 Günde NLP | Paperback | 978-975-8515-21-9 (975-8515-21-7) | Harry Alder | |
| NLP In 21 Days: A complete introduction and training programme | Hardcover | 978-0-7499-1829-3 (0-7499-1829-2) | 1999 | Dr Harry Alder |
| NLP In 21 Days: A complete introduction and training programme | Paperback | 978-0-7499-2030-2 (0-7499-2030-0) | 1999 | " |