| title | ISBN-13 | year of publication |
|---|---|---|
| Clait Plus Connect E-Tutor Network Licence 1-10 Pcs | 978-0-435-45042-7 | 2004 |
| Clait Plus Connect E-Tutor Network Licence 11-25 Pcs | 978-0-435-45043-4 | 2004 |
| Clait Plus Connect E-Tutor Network Licence 26-50 Pcs | 978-0-435-45044-1 | 2004 |
| Clait Plus Connect E-Tutor Network Licence 51-100 Pcs | 978-0-435-45045-8 | 2004 |
| Clait Plus Connect E-Tutor Single User Annual Fee | 978-0-435-45038-0 | 2004 |
| Clait Plus Connect E-Tutor Single User Licence | 978-0-435-45040-3 | 2004 |
| New Clait Connect E-Tutor Network Licence 11-25 Pcs | 978-0-435-45048-9 | 2004 |
| New Clait Connect E-Tutor Network Licence 26-50 Pcs | 978-0-435-45047-2 | 2004 |
| New Clait Connect E-Tutor Network Licence 51-100 Pcs | 978-0-435-45046-5 | 2004 |
| New Clait Connect E-Tutor Single User Annual Fee | 978-0-435-45039-7 | 2004 |
| New Clait Connect E-Tutor Single User Licence | 978-0-435-45041-0 | 2004 |