| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1992 | 978-0-9519442-0-2 | Francis Hitching | Boom Business of the 90s: Essential Start-up Guide to Network Marketing |
| 1991 | 978-0-9519442-1-9 | Francis Hitching | Boom Business of the 90s: Essential Start-up Guide to Network Marketing |
| 1993 | 978-0-9519442-2-6 | '' | Boom Business of the 90s: Essential Start-up Guide to Network Marketing |
| '' | 978-0-9519442-3-3 | '' | Boom Business of the 90s: Essential Start-up Guide to Network Marketing |