| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 200 Contractual Problems and their Solutions | 978-0-470-65831-4 (0-470-65831-2) | 2012 |
| One Hundred and Fifty Contractual Problems and Their Solutions | 978-1-4051-2070-8 (1-4051-2070-3) | 2005 |
| One Hundred Contractual Problems and Their Solutions | 978-0-632-05517-3 (0-632-05517-0) | 2000 |
J.K · J. Knowles · J R · J. Roger · R.K. · R. Knowles · Roger Knowles