| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Grammar Clear and Simple 1-2 AK | 978-0-07-282069-0 | 2003 | John R. Boyd · John Boyd |
| Grammar Clear and Simple 1 SB | 978-0-07-282068-3 | 2003 | John Boyd |
| Grammar Clear and Simple 2 SB | 978-0-07-282072-0 | 2003 | " |
| Grammar Clear and Simple 2 SB: Student Book Level 2 | 978-0-07-111065-5 | 2004 | John R. Boyd |
| Grammar Clear and Simple - Book 1 (Beginning) - Audiocassettes | 978-0-07-282070-6 | 2003 | John Boyd |
| Grammar Clear and Simple - Book 1 (Beginning) - Audio CDs | 978-0-07-282071-3 | 2003 | " |
| Grammar Clear and Simple - Book 2 - Audio CDs | 978-0-07-282075-1 | 2003 | " |
| Grammar Clear and Simple - Book 2 (High Beginning) - Audiocassettes | 978-0-07-282074-4 | 2003 | " |