IKA KARTIKA; VANESSA VICARIO. PUBLIC SPEAKING TRAINING IN INDONESIAN LANGUAGE TO IMPROVE SELF-CONFIDENCE OF TEENAGERS AT THE BENIH KEBEIKAN MEDAN. Journal of Community Service, [S. l.], v. 3, n. 2, p. 33–43, 2026. Disponível em: https://journal.trasaka.com/index.php/JCoS/article/view/102. Acesso em: 21 jul. 2026.