| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2006 | 978-1-934045-43-5 | Magnum Language Systems | MLS Easy Immersion Bulgarian Pro |
| '' | 978-1-934045-53-4 | '' | MLS Easy Immersion Estonian Pro |
| '' | 978-1-934045-62-6 | '' | MLS fácil inmersión letón Pro |
| '' | 978-1-934045-69-5 | '' | MLS Easy Immersion Quechua Pro |