An Analysys Of Vocabulary Mastery Efects On Students’ Speaking Ability In SMA YPK Pematangsiantar. Bilingual : Jurnal Pendidikan Bahasa Inggris, [S. l.], v. 5, n. 2, p. 180 – 186, 2023. DOI: 10.36985/z7pqge19. Disponível em: http://jurnal.usi.ac.id/index.php/jbl/article/view/1042. Acesso em: 10 jan. 2025.