| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Think Twice, Communication Activities for Beginner to Intermediate Students | 978-0-521-27385-5 (0-521-27385-4) | 1986 |
| Think Twice Teacher's book: Communication Activities for Beginner to Intermediate Students: Tchrs' | 978-0-521-27386-2 (0-521-27386-2) | 1986 |