| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Protection of Computer Software: Its Technology and Application | 978-0-521-42462-2 (0-521-42462-3) | 1992 |
| The Protection of Computer Software - its Technology and Applications | 978-0-521-35335-9 (0-521-35335-1) | 1989 |