- Author: L. L. Zamenhof
- Language: Esperanto
- Year: 1888
- Author: L. L. Zamenhof (tradukinto)
- Language: Esperanto
- Year: 1988
- Author: L. L. Zamenhof (tradukinto)
- Language: Esperanto
- Year: 2007
- Author: L. Zamenhof
- Language: Esperanto
- Year: 2005
- Author: Zamenhof L.L.
- Language: Esperanto
- Author: L. L. Zamenhof
- Language: Spanish
- Year: 1991