M S. · W. M. · W.S. · Williams M
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Answer Key for Student Activities Manua | 978-0-205-81710-8 (0-205-81710-6) | 2014 |
| Audio Cds for Espirales | 978-0-205-81712-2 (0-205-81712-2) | 2014 |
| Audio Cds for the Student Actitivies Ma | 978-0-205-81711-5 (0-205-81711-4) | 2014 |