Ruswandi, Noviyanti, and Joko Suprapmanto. “The Effect of Project-Based Learning Involving Percussion Instruments on the Self-Confidence of Fourth-Grade Elementary School Students”. International Journal of Science and Society 8, no. 4 (November 6, 2026): 755-761. Accessed November 7, 2026. https://www.ijsoc.goacademica.com/index.php/ijsoc/article/view/1835.