| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Marketing Calculator: Measuring and Managing Return on Marketing Investment | 978-0-470-82395-8 (0-470-82395-X) | 2008 |
| Return on Marketing Investment | 978-0-9718598-1-4 (0-9718598-1-7) | 2003 |
G. P. · G Powell · Guy Powell · R. P. · R. Powell