Eckes George. (2005). Six sigma execution: How to World's greatest companies live and breathe six sigma (sách photo) (In lần thứ 1.). American: McGraw-Hill.
استشهاد بنمط شيكاغوEckes George. Six Sigma Execution: How to World's Greatest Companies Live and Breathe Six Sigma (sách Photo). In lần thứ 1. American: McGraw-Hill, 2005.
MLA استشهادEckes George. Six Sigma Execution: How to World's Greatest Companies Live and Breathe Six Sigma (sách Photo). In lần thứ 1. American: McGraw-Hill, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.