| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Dias con sapo y sepo / Days With Frog and Toad | 978-1-56014-588-2 (1-56014-588-9) | 1998 | Arnold Lobel |
| Sapo y sepo, un ano entero / Frog And Toad All Year | 978-84-204-3052-2 (84-204-3052-8) | 1999 | " |