KOONTZ HAROLD. (1982). ESSENTIALS OF MANAGEMENT (3RD.). TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
Lua i Stíl Chicago (17ú heag.)KOONTZ HAROLD. ESSENTIALS OF MANAGEMENT. 3RD. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1982.
Lua MLA (9ú heag.)KOONTZ HAROLD. ESSENTIALS OF MANAGEMENT. 3RD. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.