1. CLSI . Quality Management System: A Model for Laboratory Services; Approved Guideline—Fourth Edition. CLSI document GP26-A4. Wayne, PA: Clinical and Laboratory Standards Institute; 2011.
2. CLSI/NCCLS . A Quality Management System Model for Health Care; Approved Guideline—Second Edition. CLSI/NCCLS document HS01-A2. Wayne, PA: NCCLS; 2004.
3. CLSI/NCCLS . Application of a Quality Management System Model for Laboratory Services; Approved Guideline—Third Edition. CLSI/NCCLS document GP26-A3. Wayne, PA: NCCLS; 2004.
4. ISO . Medical laboratories—Particular requirements for quality and competence. ISO 15189. Geneva, Switzerland: International Organization for Standardization; 2007.
5. ISO/IEC . General requirements for the competence of testing and calibration laboratories. ISO/IEC 17025. Geneva, Switzerland: International Organization for Standardization; 2005.