Lua APA (7ú heag.)

(2005). Six sigma for transactions and serviceParveen S. Goel [et.al.]. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Six Sigma for Transactions and ServiceParveen S. Goel [et.al.]. McGraw-Hill, 2005.

Lua MLA (8ú heag.)

Six Sigma for Transactions and ServiceParveen S. Goel [et.al.]. McGraw-Hill, 2005.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.