M.A. ยท Michael A.
| title | ISBN-13 | year of publication |
|---|---|---|
| A Dangerous Sky Level 6 Advanced | 978-1-107-69405-7 | 2013 |
| A Dangerous Sky Level 6 Advanced Book with Audio CDs Pack | 978-1-107-67555-1 | 2013 |
| Berlin Express Level 4 Intermediate | 978-0-521-17490-9 | 2010 |
| Berlin Express Level 4 Intermediate Student Book with Audio CDs | 978-0-521-17511-1 | 2010 |