IKA KARTIKA, and VANESSA VICARIO. “PUBLIC SPEAKING TRAINING IN INDONESIAN LANGUAGE TO IMPROVE SELF-CONFIDENCE OF TEENAGERS AT THE BENIH KEBEIKAN MEDAN”. Journal of Community Service, vol. 3, no. 2, June 2026, pp. 33-43, https://journal.trasaka.com/index.php/JCoS/article/view/102.