| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Contigo Essentials of Spanish | 978-0-03-029979-7 (0-03-029979-9) | 1991 | Oscar Ozete |
| Contigo: Essentials of Spanish | 978-0-03-001828-2 (0-03-001828-5) | 1987 | " |
| Contigo: Essentials of Spanish/Manual De Ejercicios Y De Laboratorio to Accompany the 2nd Edition | 978-0-03-029977-3 (0-03-029977-2) | 1987 | " |
D G · D. Guillen · S D · S. G. · Sergio D. Guillen Oscar Ozete