Friska Simatupang, Dwi Puspitosari, Lestari Batubara. Improving Students’ Vocabulary Skills Using Word Wall Media in Grade Seventh Students at SMP Negeri 2 Wamena. pchukumsosial [Internet]. 2026 Mar. 7 [cited 2026 Aug. 8];3(3):807-26. Available from: https://pchukumsosial.org/index.php/pchs/article/view/235