ANGGRIANI, Decy; -, Sumarsih. Improving Students™ Vocabulary Achievement Through Word Walls Strategy. TRANSFORM : Journal of English Language Teaching and Learning, North Sumatera, Indonesia, v. 2, n. 3, 2013. DOI: 10.24114/tj.v2i3.920. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/jelt/article/view/920. Acesso em: 4 jul. 2025.