| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The English Teacher for Portuguese-Speakers | 978-1-891991-01-1 (1-891991-01-9) | 1998 |
| The English Teacher for Spanish-Speakers | 978-1-891991-00-4 (1-891991-00-0) | 1998 |
| The Spanish Teacher for English-speakers | 978-1-891991-02-8 (1-891991-02-7) | 1998 |