The Analysis of Vocabulary Mastery to Improve in Speaking Skill at SMPN 4 Pematangsiantar. Bilingual : Jurnal Pendidikan Bahasa Inggris, [S. l.], v. 7, n. 2, p. 167 – 175, 2025. DOI: 10.36985/pagz5650. Disponível em: http://jurnal.usi.ac.id/index.php/jbl/article/view/2005. Acesso em: 31 oct. 2025.