Koontz, H. (2011). Essentials of management. Tata McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Koontz, Harold. Essentials of Management. New Delhi: Tata McGraw Hill, 2011.
Lua MLA (9ú heag.)Koontz, Harold. Essentials of Management. Tata McGraw Hill, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.