| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Voices 1 Workbook CD | 978-83-7621-032-2 (83-7621-032-7) | 2011 |
| Voices 4 Workbook z plyta CD | 978-83-7621-053-7 (83-7621-053-X) |
B. B. · B.K.S. · B.S. · Bilsborough Steve · K. B. · K. Bilsborough · K S · Katherine Bilsborough · Katherine S.