| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Impact Conversation Level 1 Student Book w/CD | 978-962-01-9933-2 (962-01-9933-2) | 2008 | Kristen Sullivan · Michael Rost |
| Impact Conversation Level 2 Student Book w/CD | 978-962-01-9934-9 (962-01-9934-0) | 2008 | Kristen Sullivan · Michael Rost |
A.S. · A. Sullivan · B. A. · B.S. · B. Sullivan