ENGEL HERBERT. (1990). HOW TO DELEGATE A GUIDE TO GETTING THINGS DONE (2.). JAICO PUBLISHING HOUSE.
Chicago-viite (17. p.)ENGEL HERBERT. HOW TO DELEGATE A GUIDE TO GETTING THINGS DONE. 2. BOMBAY: JAICO PUBLISHING HOUSE, 1990.
MLA-viite (9. p.)ENGEL HERBERT. HOW TO DELEGATE A GUIDE TO GETTING THINGS DONE. 2. JAICO PUBLISHING HOUSE, 1990.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.