Παραπομπή σε μορφή APA (7η εκδ.)

Quality control systems and services & Gumpp, G. B. (1995). ISO 9001-9003 quality system audit and checklist: Handbook for system assessment and certification. Quality control systems and services.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Quality control systems and services και Gunther B. Gumpp. ISO 9001-9003 Quality System Audit and Checklist: Handbook for System Assessment and Certification. Washington: Quality control systems and services, 1995.

Παραπομπή σε μορφή MLA (8th εκδ.)

Quality control systems and services και Gunther B. Gumpp. ISO 9001-9003 Quality System Audit and Checklist: Handbook for System Assessment and Certification. Quality control systems and services, 1995.