Hawkins,Douglas M, & Olwell, D. H. (1998). Cumulative sum charts and charting for quality improvement. Springer.
Dyfyniad Arddull ChicagoHawkins,Douglas M, and David H. Olwell. Cumulative Sum Charts and Charting for Quality Improvement. New York: Springer, 1998.
Dyfyniad MLAHawkins,Douglas M, and David H. Olwell. Cumulative Sum Charts and Charting for Quality Improvement. Springer, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.