HERIYANTO NURCAHYO; SUKARNO; HAIRUS SALIKIN. The Use of Engghi-Bhunten Speaking Levels by Madurese Students in Al-Azhar Islamic Boarding School: A Sociolinguistic Study. RETORIKA: Jurnal Ilmu Bahasa, [S. l.], v. 9, n. 2, p. 144–156, 2023. DOI: 10.22225/jr.9.2.2023.144-156. Disponível em: https://www.ejournal.warmadewa.ac.id/index.php/jret/article/view/5935. Acesso em: 16 jan. 2026.