1. Institute of Medicine. Crossing the Quality Chasm: A New Health 21st Century. Washington, DC: National Academies Press; 2001.
2. Juran JM. Juran's Quality Handbook. 1st ed. New York, NY: McGraw-Hill; 1951.
3. Westgard JO. Six Sigma Quality Design and Control. Madison, WI: Westgard QC; 2001. p. 225.
4. Clinical and Laboratory Standards Institute. CLSI Understanding the Cost of Quality in the Laboratory; A Report. CLSI document QMS20-R. Wayne PA: Clinical and Laboratory Standards Institute; 2014.
5. The reporting, classification and grading of quality failures in the medical laboratory;O'Kane;Clin Chim Acta,2009