| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Plain English: Book 1 | 978-0-07-481459-8 (0-07-481459-1) | 1986 | Anna K. Walsh |
| Plain English, Book 2 | 978-0-07-481463-5 (0-07-481463-X) | 1987 | " |
| Plain English Book 4 | 978-0-07-481465-9 (0-07-481465-6) | 1987 | |