Ryan, T. P. (2000). Statistical methods for quality improvement (2nd ed.). John Wiley.
Dyfyniad Arddull ChicagoRyan, Thomas P. Statistical Methods for Quality Improvement. 2nd ed. New York: John Wiley, 2000.
Dyfyniad MLARyan, Thomas P. Statistical Methods for Quality Improvement. 2nd ed. John Wiley, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.