| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Loyalty Unplugged: How to Get, Keep & Grow All Four Generations | 978-1-4257-4926-2 (1-4257-4926-7) | 2007 | Adwoa K Buahene |
| Upgrade Now - 9 Advanced Leadership Skills | 978-1-77084-198-7 (1-77084-198-9) | 2012 | |