Giovani Br Lubis, Meikardo Samuel Prayuda, and Fiber Yun Almanda Ginting, “The Effectiveness of Gamification Technique to Students’ English Vocabulary Acquisition for Seventh Grade Junior High School Students at SMP N 31 Medan: Penelitian”, JERKIN, vol. 4, no. 1, pp. 2827–2832, Jul. 2025.