1. ISO 15189 (2003) Medical laboratories?particular requirements for quality and competence. International Organization for Standardization (ISO), Geneva
2. International Laboratory Accreditation Cooperation (ILAC). http://www.ilac.org
3. Asia Pacific Laboratory Accreditation Cooperation (APLAC). http://www.ianz.govt.nz/aplac/
4. ISO 17025 (1999) General requirements for the competence of testing and calibration laboratories. ISO, Geneva
5. European Committee for Standardization (CEN). http://www.cenorm.be/cenorm/index.htm