M.C. · **O.C.** · O. M. · Olga M.
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Gramatica Activa | 978-972-757-143-7 (972-757-143-3) | ||
| Gramatica Ativa: Book 1 | 978-972-757-638-8 (972-757-638-9) | 2011 | |
| Gramatica Ativa - Versao Brasileira: Book 1 (Brazilian Version) + CD | 978-972-757-931-0 (972-757-931-0) | 2012 | Isabel Coimbra |