PANDE PETE. (2002). WHAT IS SIX SIGMA. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
Lua i Stíl Chicago (17ú heag.)PANDE PETE. WHAT IS SIX SIGMA. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2002.
Lua MLA (9ú heag.)PANDE PETE. WHAT IS SIX SIGMA. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.