| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 50 Powerful Ideas You Can Use to Keep Your Customers | 978-1-56414-599-4 (1-56414-599-9) | 2002 |
| 50 Powerful Ways to Win New Customers, Second Edition | 978-1-56414-307-5 (1-56414-307-4) | 1997 |
| Successful Self-Management | 50-Minute Manager Series | 978-1-4246-2295-5 (1-4246-2295-6) | 2014 |
P.P. · P R · P T · Paul P. · Paul R. · Paul R. Timm · Paul T. · Paul Timm · R. P. · R. T. · T.P