Stefan Zweifel · Stephan Zipfel · Stephan Zobel · Stephanie Zibell
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| FSI: Programmatic Italian - Instructor's Manual | 978-1-62392-294-8 (1-62392-294-1) | 2013 |
| FSI: Programmatic Italian - Student Textbook | 978-1-62392-295-5 (1-62392-295-X) | 2013 |