| title | ISBN-13 | year of publication |
|---|---|---|
| Tdlb Competence for Advisors, Candidate-Assessors and Verifiers in Administration | 978-0-273-61298-8 | 1995 |
| Tdlb Competence for Advisors, Candidate-Assessors and Verifiers in Customer Service | 978-0-273-61677-1 | 1995 |
| Tdlb Competence for Advisors, Candidate-Assessors and Verifiers in Hairdressing | 978-0-273-61467-8 | 1995 |
| Tdlb Competence for Advisors, Candidate-Assessors and Verifiers in Management | 978-0-273-61463-0 | 1995 |
| Tdlb Competence for Advisors, Candidate-Assessors and Verifiers in Selling | 978-0-273-61464-7 | 1995 |