Engel, H. (2004). How to delegate: A guide to getting things done.
Lua i Stíl Chicago (17ú heag.)Engel, Herbert. How to Delegate: A Guide to Getting Things Done. Mumbai, 2004.
Lua MLA (9ú heag.)Engel, Herbert. How to Delegate: A Guide to Getting Things Done. 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.