Lua APA (7ú heag.)

Ray Subhadrata MPE. (2011). Six Sigma: Controlling & Improving Production Process & Quality. MPE-NMIMS.

Lua i Stíl Chicago (17ú heag.)

Ray Subhadrata MPE. Six Sigma: Controlling & Improving Production Process & Quality. Mumbai: MPE-NMIMS, 2011.

Lua MLA (9ú heag.)

Ray Subhadrata MPE. Six Sigma: Controlling & Improving Production Process & Quality. MPE-NMIMS, 2011.

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