Engel, H. (1983). How to delegate: A guide to getting things done. Jaico.
Lua i Stíl Chicago (17ú heag.)Engel, Herberl. How to Delegate: A Guide to Getting Things Done. Bombay: Jaico, 1983.
Lua MLA (9ú heag.)Engel, Herberl. How to Delegate: A Guide to Getting Things Done. Jaico, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.