Daniel J.O Siringoringo, Christian Neni Purba, and Asima Rohana Sinaga. “The Effect of Scrabble Game on Students’ Vocabulary Mastery of Grade Eight at SMP Negeri 12 Pematang Siantar”. Jurnal Ilmu Pendidikan Dan Sosial, vol. 2, no. 3, Oct. 2023, pp. 345-57, doi:10.58540/jipsi.v2i3.441.