| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Italian: Learn Italian In 21 DAYS! - A Practical Guide To Make Italian Look Easy! EVEN For Beginners | 978-1-5233-7113-6 (1-5233-7113-7) | 2016 |
| Portuguese: Learn Portuguese In 21 DAYS! - A Practical Guide To Make Portuguese Look Easy! EVEN For Beginners | 978-1-5232-6349-3 (1-5232-6349-0) | 2016 |
| Spanish: Learn Spanish In 21 DAYS! - A Practical Guide To Make Spanish Look Easy! EVEN For Beginners | 978-1-5195-0669-6 (1-5195-0669-4) | 2015 |
Henri R. · Henri Rey · Henry Rey · Henry Roe · Henry Rowe · Henry Roy