| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2017 | 978-1-9997388-0-8 | Richard Legg | Hidden Profits: Get more sales, bigger profits and greater freedom by unlocking the invisible revenue sources that already exist in your business. |
| '' | 978-1-9997388-2-2 | '' | Hidden Profits: Get more sales, bigger profits and greater freedom by unlocking the invisible revenue sources that already exist in your business. |