Dyfyniad APA

(2005). Six sigma for transactions and service. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Six Sigma for Transactions and Service. New York: McGraw-Hill, 2005.

Dyfyniad MLA

Six Sigma for Transactions and Service. New York: McGraw-Hill, 2005.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.