SINAGA, J. H.; NAPITUPULU, S. Vocabulary Mastery Challenges Among Indonesian Public Junior High School Students. Jurnal Ilmu Sosial dan Humaniora , [S. l.], v. 4, n. 1, p. 177–184, 2026. DOI: 10.58540/isihumor.v4i1.1379. Disponível em: https://putrapublisher.org/ojs/index.php/isihumor/article/view/1379. Acesso em: 18 apr. 2026.