| https://it.wikisource.org/wiki/Opera:Enrico_IV | wikisource |
| https://en.wikipedia.org/wiki/Henry_IV_(Pirandello_play) | wikipedia |
| https://ca.wikipedia.org/wiki/Enric_IV_(Pirandello) | wikipedia |
| https://de.wikipedia.org/wiki/Heinrich_IV._(Pirandello) | wikipedia |
| https://eo.wikipedia.org/wiki/Henriko_la_4a_(teatraĵo) | wikipedia |
| https://es.wikipedia.org/wiki/Enrique_IV_(Pirandello) | wikipedia |
| https://fr.wikipedia.org/wiki/Henri_IV_(Pirandello) | wikipedia |
| https://gl.wikipedia.org/wiki/Enrico_IV | wikipedia |
| https://he.wikipedia.org/wiki/אנריקו_הרביעי | wikipedia |
| https://it.wikipedia.org/wiki/Enrico_IV_(Pirandello) | wikipedia |
| https://ja.wikipedia.org/wiki/エンリコ四世_(戯曲) | wikipedia |
| https://nl.wikipedia.org/wiki/Enrico_IV_(toneelstuk) | wikipedia |
| https://pl.wikipedia.org/wiki/Henryk_IV_(dramat) | wikipedia |
| https://sh.wikipedia.org/wiki/Enrico_IV | wikipedia |
| https://sv.wikipedia.org/wiki/Henrik_IV_(pjäs_av_Pirandello) | wikipedia |
