V. Arifin, V. Handayani, L. K. Wardhani, H. B. Suseno, and S. U. Masruroh, “User Interface and Exprience Gamification-Based E-Learning with Design Science Research Methodology”, MATRIK : Jurnal Manajemen, Teknik Informatika dan Rekayasa Komputer, vol. 22, no. 1, pp. 165–176, Nov. 2022, doi: 10.30812/matrik.v22i1.2427.