| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Speak in a Week Brazilian Portuguese Week 1 | 978-1-59125-927-5 (1-59125-927-4) | 2008 | Vivianne Gontijo · Donald S. Rivera |
| Speak in a Week Spanish: Week 1 | 978-1-59125-285-6 (1-59125-285-7) | 2003 | Donald S. Rivera |
| Speak in a Week: Week Four | 978-1-59125-288-7 (1-59125-288-1) | 2004 | " |