Friska Simatupang, Dwi Puspitosari, and Lestari Batubara. “Improving Students’ Vocabulary Skills Using Word Wall Media in Grade Seventh Students at SMP Negeri 2 Wamena”. Jurnal Pustaka Cendekia Hukum dan Ilmu Sosial 3, no. 3 (March 7, 2026): 807–826. Accessed August 8, 2026. https://pchukumsosial.org/index.php/pchs/article/view/235.