YANA, S.; SAMANIK, S.; ALRAJAFI, G. An Analysis Errors Diphthong Made By President Joko Widodo Speech . English Language and Arts Education Journal, [S. l.], v. 1, n. 2, p. 118–131, 2024. Disponível em: https://journal.cmbpublisher.com/index.php/ELAEJ/article/view/10. Acesso em: 25 oct. 2025.