Sitompul, Delfia Magdalena, et al. “The Effect of Wordwall Game on English Vocabulary Mastery of Grade Eight Students at SMP Tamansiswa Pematangsiantar”. Innovative: Journal Of Social Science Research, vol. 4, no. 6, Nov. 2024, pp. 1421-9, doi:10.31004/innovative.v4i6.16489.