Hendrawan D, Zega AS, Tambunan ADG, Maulana A, Matondang A, Nababan P. Exercise Management as a Predictor of Success in Extracurricular Activities among Junior High School Students in Medan. JOSKA [Internet]. 2025 Mar. 28 [cited 2026 Mar. 4];2(01):24-9. Available from: https://isorikampar.igiinsight.com/index.php/joska/article/view/22