Bakar, Ryan Abu, Mustika Fitri, Yusuf Hidayat, Amung Ma'mun, and Rola Angga Lardika. “The Effectiveness of Outdoor Education on Positive Youth Development and 21st Century Skills”. Journal Sport Area 9, no. 3 (November 28, 2024): 440–450. Accessed July 23, 2026. https://journal.uir.ac.id/index.php/JSP/article/view/16758.