Plaster, G. A., & Alderman, J. D. (2006). Beyond Six Sigma: Profitable Growth through Customer Value Creation. John Wiley & Sons, Inc.
Lua i Stíl Chicago (17ú heag.)Plaster, Gary A., agus Jerry D. Alderman. Beyond Six Sigma: Profitable Growth Through Customer Value Creation. New Jersey: John Wiley & Sons, Inc, 2006.
Lua MLA (9ú heag.)Plaster, Gary A., agus Jerry D. Alderman. Beyond Six Sigma: Profitable Growth Through Customer Value Creation. John Wiley & Sons, Inc, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.