Hendricks, C.A.; Kelbaugh, R. Implementing Six Sigma at GE. The Journal of Quality and Participation. 1998, 21 (4): 48–53 [2011-01-26]. (原始内容存档于2009-05-01).
Hendricks, C.A.; Kelbaugh, R. Implementing Six Sigma at GE. The Journal of Quality and Participation. 1998, 21 (4): 48–53 [2011-01-26]. (原始内容存档于2009-05-01).