L.D. · Lex Donaldson · Lisa Donald · Luke Donald
Da Capo Lifelong Books · Prentice Hall
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Conversational Magic: Key to Poise, Popularity, and Success | 978-0-13-172155-5 | 1981 | |
| How to use psychological leverage to double the power of what you say | 978-0-13-437038-5 | 1978 | |
| Human Resource Development: The New Trainer's Guide | 978-0-7382-0328-7 | 2000 | Edward Scannell · Edward S. Scannell |
| Psychological Leverage | 978-0-13-732438-5 | 1982 | |