R. S. ยท Roberto Rodriquez-Saona
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Colloquial Spanish of Latin America 2: The Next Step in Language Learning | 978-0-415-28198-0 (0-415-28198-9) | 2005 | |
| Colloquial Spanish of Latin America: The Complete Course for Beginners | 978-0-415-23787-1 (0-415-23787-4) | 2001 | Roberto Rodriquez-Saona |