| 978-9978-82-693-5 | Learning English Workbook | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa
Flavio Washington Muñoz Mejía
Patricio Albán Vaca
Luis Albán Vaca
| 1995 |
| 978-9978-82-703-1 | Learning English Workbook (Nivel 6) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa
Flavio Washington Muñoz Mejía
Patricio Albán Vaca
Luis Albán Vaca
| 1995 |
| 978-9978-82-704-8 | Learning English Workbook (Nivel 2) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa
Flavio Washington Muñoz Mejía
Patricio Albán Vaca
Luis Albán Vaca
| 1995 |
| 978-9978-82-705-5 | Learning English Worbook (Nivel 1) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa
Flavio Washington Muñoz Mejía
Patricio Albán Vaca
Luis Albán Vaca
| 1995 |
| 978-9978-82-706-2 | Learning English Workbook (Nivel 4) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa
Flavio Washington Muñoz Mejía
Patricio Albán Vaca
Luis Albán Vaca
| 1995 |
| 978-9978-82-707-9 | Learning English Workbook (Nivel 5) | AUTORES VARIOS CEL | Ana Cecilia Buenaño Checa
Flavio Washington Muñoz Mejía
Patricio Albán Vaca
Luis Albán Vaca
| 1995 |