Ulya, E. Z. ., N. Ma'mun, and N. M. Dewi. “Students’ Perceptions of Vocabulary Recall and Engagement in Wordwall-Based Gamified Learning”. Celtic : A Journal of Culture, English Language Teaching, Literature and Linguistics, vol. 12, no. 2, Dec. 2025, pp. 972-89, doi:10.22219/celtic.v12i2.42806.