Aris Triwahyu Febriansah, Yerry Soepriyanto, and Muhibuddin Fadhli. “Leaderboard As an Element of Gamification and Student Self-Efficacy for Performance Achievement”. Jurnal Ilmiah Pendidikan Profesi Guru 7, no. 3 (November 25, 2024): 508–519. Accessed March 12, 2025. https://ejournal.undiksha.ac.id./index.php/JIPPG/article/view/84477.