Ashfiah, D., Rafi’ah Nur, Salasiah Ammade, Ammang Latifa, and Syawal. “Gamification in ELT: A Systematic Review of Its Effects on Learner Engagement and Motivation”. FOSTER: Journal of English Language Teaching, Vol. 6, no. 1, Jan. 2025, pp. 22-42, doi:10.24256/foster-jelt.v6i1.248.