| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| NOW, DISCOVER YOUR STRENGTHS: HOW TO DEVELOP YOUR TALENTS AND THOSE OF THE PEOPLE YOU MANAGE | 978-O-7432-O686-O (O-7432-O686-X) | 2001 |
C.M. · D.C. · D. M. · D.O. · Donald C. · Donald Clifton · Donald O · Donald O. Clifton · **O.C.** · O. M.