IKA KARTIKA and VANESSA VICARIO (2026) “PUBLIC SPEAKING TRAINING IN INDONESIAN LANGUAGE TO IMPROVE SELF-CONFIDENCE OF TEENAGERS AT THE BENIH KEBEIKAN MEDAN”, Journal of Community Service, 3(2), pp. 33–43. Available at: https://journal.trasaka.com/index.php/JCoS/article/view/102 (Accessed: 21 July 2026).