| russkij | rus-001 |
| spravočnoje posobije | |
| Deutsch | deu-000 | Nachschlagewerk |
| Ellinika | ell-003 | enchirídio |
| Ellinika | ell-003 | enkyklopédia |
| English | eng-000 | reference book |
| English | eng-000 | reference work |
| English | eng-000 | work of reference |
| français | fra-000 | ouvrage de référence |
| italiano | ita-000 | opera di consultazione |
| Nederlands | nld-000 | naslagwerk |
| bokmål | nob-000 | oppslagsverk |
| español | spa-000 | libro de consulta |
| español | spa-000 | obra de consulta |
| svenska | swe-000 | uppslagsverk |