Bass, I. (2009). Lean six sigma using SigmaXL and Minitab. New York: McGraw-Hill.
Dyfyniad Arddull ChicagoBass, Issa. Lean Six Sigma Using SigmaXL and Minitab. New York: McGraw-Hill, 2009.
Dyfyniad MLABass, Issa. Lean Six Sigma Using SigmaXL and Minitab. New York: McGraw-Hill, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.