F. J. · freebairn/bygrave · I. B. · I. J.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Upbeat 1 Language builder with CD | 978-83-7600-035-0 (83-7600-035-7) | 2010 |
| Upbeat 2 language builder with CD | 978-83-7600-008-4 (83-7600-008-X) | 2010 |
| Upbeat 4 Language Builder + CD | 978-83-7600-427-3 (83-7600-427-1) | 2011 |