Che Ku Mohamad, C. K. N. A., and A. R. Hassan. “Pendekatan Gamifikasi Dalam Pembelajaran Al-’Adad Wa Al-Ma’dud Dalam Kalangan Pelajar: The Effects of Gamification Approach to Al-’Adad Wa Al-Ma’dud Among Students”. Al-Muqaddimah: Online Journal of Islamic History and Civilization, vol. 7, no. 1, June 2020, pp. 11-22, https://ejournal.um.edu.my/index.php/MUQADDIMAH/article/view/24259.