Nainggolan, Gindo Tua, and Asnawi. “The Development of Game Based English Vocabulary Learning Materials for 8th Grade Students”. International Journal of Educational Research Excellence (IJEREC) 6, no. 1 (September 8, 2026): 749–757. Accessed September 15, 2026. https://ejournal.ipinternasional.com/index.php/ijere/article/view/1928.