HILL TERRY. (1995). ESSENCE OF OPERATING MANAGEMENT. PRENTICE -HALL INTERNATIONAL, INC.
Lua i Stíl Chicago (17ú heag.)HILL TERRY. ESSENCE OF OPERATING MANAGEMENT. NEW JERSEY,USA: PRENTICE -HALL INTERNATIONAL, INC, 1995.
Lua MLA (9ú heag.)HILL TERRY. ESSENCE OF OPERATING MANAGEMENT. PRENTICE -HALL INTERNATIONAL, INC, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.