| REFA-Ausbildungen Qualitätsmanagement | REFA Ausbildungen | REFA-Interner Auditor, REFA-Qualitätsmanager, REFA-Qualitätsbeauftragter |
| REFA-Interner Auditor | REFA Ausbildungen | REFA-Interner Auditor, Qualitätsmanagement, Auditor |
| Interner Auditor | REFA Seminare | Auditor, REFA-Interner Auditor, Qualitätsmanagement |
| Qualitätsmanagement in der Praxis | REFA Seminare | Auditor, REFA-Interner Auditor, Qualitätsmanagement, REFA-Techniker |
