Tengku Paris, Tengku Nazatul Shima, Ramlan Mustapha, and Hafiza Abas. “Mobile Educational Game Principles in Language Learning: Validity and Reliability”. Environment-Behaviour Proceedings Journal 8, no. 23 (March 24, 2023): 53–60. Accessed May 16, 2024. https://ebpj.e-iph.co.uk/index.php/EBProceedings/article/view/4506.