El Cuarto Protocolo
| Book | The Fourth Protocol |
| Format | Unknown |
| Language | Spanish |
| Original Title | The Fourth Protocol |
| Original Language | English |
| Author | Frederick Forsyth |
| Format | Unknown |
| Language | Spanish |
| Book | The Fourth Protocol |
| Format | Unknown |
| Language | Spanish |
| Original Title | The Fourth Protocol |
| Original Language | English |
| Author | Frederick Forsyth |
| Format | Unknown |
| Language | Spanish |