| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| 60-Second Spanish Grammar Workout: 140 Speed Tests to Boost Your Fluency | 978-0-658-00429-2 (0-658-00429-8) | 2000 | Jose Cardenes Melian |
| 60-Second Spanish Vocabulary Workout: 140 Speed Tests to Boost Your Fluency | 978-0-658-00427-8 (0-658-00427-1) | 2000 | " |