DILWORTH JAMES B. (1989). PRODUCTION & OPERATIONS MANAGEMENT MANUFACTURING & NONMGTT AND NONMANUFACHRING (4.). MCGRAW-HILL.
Lua i Stíl Chicago (17ú heag.)DILWORTH JAMES B. PRODUCTION & OPERATIONS MANAGEMENT MANUFACTURING & NONMGTT AND NONMANUFACHRING. 4. NEW YORK: MCGRAW-HILL, 1989.
Lua MLA (9ú heag.)DILWORTH JAMES B. PRODUCTION & OPERATIONS MANAGEMENT MANUFACTURING & NONMGTT AND NONMANUFACHRING. 4. MCGRAW-HILL, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.