Gaya APA

Williams, C, G, D, &, B. (2008). Six Sigma For Dummies by Craig Gygi, Neil DeCarlo, Bruce Williams, Stephen R. Covey . : .

Gaya MLA

Williams, Craig, Gygi,Neil, Decarlo, &, Bruce. "Six Sigma For Dummies by Craig Gygi, Neil DeCarlo, Bruce Williams, Stephen R. Covey". : , 2008. Text.