| Lead by example | AMACOM | Tiada | 2009 | 978-8144-1294-7 |
| Lead your boss | AMACOM | Tiada | 2010 | 978-0-8144-1505-4 |
| Why leaders can't lead | | Tiada | 1989 | 1555421520 |
| You can be positive, confident and courageous: learn to lead a more meaningful life | Thinker's Library | Tiada | 2006 | 967690676-X |