Craig Gygi (Gygi, Craig)

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  via
  Six Sigma for Dummies
  by Bruce Williams, Neil Decarlo
  Softcover, John Wiley & Sons Inc, ISBN 0764567985 (0-7645-6798-5)
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  Six Sigma For Dummies
  by Stephen R. Covey, Bruce Williams, Neil Decarlo, Craig Gygi
  Hardcover, John Wiley & Sons, ISBN 047175109X (0-471-75109-X)
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  via
  Six Sigma für Dummies
  by Craig Gygi, Neil DeCarlo, Bruce Williams, Birgit Schöbitz
  Softcover, Wiley-VCH Verlag GmbH, ISBN 3527702075 (3-527-70207-5)
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  via
  Six Sigma Workbook for Dummies
  by Bruce Williams, Craig Gygi, Terry Gustafson
  Softcover, John Wiley & Sons Inc, ISBN 0470045191 (0-470-04519-1)