APA aipamena

(2004).  Six sigma for transactions and service.  MCGraw-Hill.

Chicago Style aipamena

 Six Sigma for Transactions and Service.  MCGraw-Hill, 2004.

MLA aipamena

 Six Sigma for Transactions and Service.  MCGraw-Hill, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.