BAGCHI TAPAN P. (1994). ISO 9000 CONCEPTS METHODS & IMPLEMENTATION. WHEELER.
Lua i Stíl Chicago (17ú heag.)BAGCHI TAPAN P. ISO 9000 CONCEPTS METHODS & IMPLEMENTATION. NEW DELHI: WHEELER, 1994.
Lua MLA (9ú heag.)BAGCHI TAPAN P. ISO 9000 CONCEPTS METHODS & IMPLEMENTATION. WHEELER, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.