J. A. Abubakar, A. S. Bahrin, M. K. Ahmad, and A. N. Zulkifli, “Conceptual Model of Game Aesthetics for Perceived Learning in Narrative Games”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 7, no. 3, pp. 993–999, Jun. 2017.