| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Effective Interviewing for Business Selection | 978-0-220-67005-4 (0-220-67005-6) | 1979 |
| Effective Interviewing for Employment Selection | 978-0-09-150330-7 (0-09-150330-2) | 1983 |
| Effective Speaking and Presentation for the Company Executive | 978-0-220-67028-3 (0-220-67028-5) | 1980 |