B. D. · Birgit Diebel · Brigitte S. Dubiel
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Deutsch Macht Spaß!: An Easy-to-Understand German Grammar Review with Hagar® and Peanuts® Cartoons in German | 978-0-9845322-1-6 (0-9845322-1-8) | 2012 |
| Deutsch macht Spaß!: Easy-to-Understand German Grammar for English-Speaking Students | 978-0-9845322-0-9 (0-9845322-0-X) | 2011 |