1. The Improvement Guide;Langley,2009
2. Economic Control of Quality of Manufactured Product;Shewhart,1931
3. Monitoring patients using control charts: a systematic review;Tennant;Int J Qual Health Care.,2007
4. The Health Care Data Guide: Learning From Data for Improvement;Provost,2011
5. Statistical Methods From the Viewpoint of Quality Control;Shewhart,1939