Ardyanto, Sofyan. “Badminton Stroke Skill Levels in Children Aged 10-12 Years at Kaisar Badminton Club Tegal Regency”. Indonesian Journal of Sport Management 4, no. 2 (May 31, 2024): 239–246. Accessed June 21, 2025. https://ejournal.unma.ac.id/index.php/ijsm/article/view/9762.