| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Euskara 1. - 9788467847406 | 978-84-678-4740-6 (84-678-4740-9) | 2014 | Asier Romero Andonegi · Gontzal Fontecilla Saiz |
| Euskara 2. - 9788467877267 | 978-84-678-7726-7 (84-678-7726-X) | 2015 | Mª Jesús Angoitia Barrenechea · Gontzal Fontecilla Saiz |
| Euskara 3. Koadernoa. - 9788467849592 | 978-84-678-4959-2 (84-678-4959-2) | 2015 | Asier Romero Andonegi · Gontzal Fontecilla Saiz |