HELLER, R. (1996). THE COMPLETE GUIDE TO MODERN MANAGEMENT. JAICO PUBLISHING HOUSE.
Lua i Stíl Chicago (17ú heag.)HELLER, ROBERT. THE COMPLETE GUIDE TO MODERN MANAGEMENT. BOMBAY: JAICO PUBLISHING HOUSE, 1996.
Lua MLA (9ú heag.)HELLER, ROBERT. THE COMPLETE GUIDE TO MODERN MANAGEMENT. JAICO PUBLISHING HOUSE, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.