Br Bangun HK, Simanjuntak DC. The Effects of Vocabulary Mastery on English-Speaking Ability: A Meta-Analysis Study. JOLLT [Internet]. 2022 Apr. 22 [cited 2025 Aug. 14];10(2):211-22. Available from: https://e-journal3.undikma.ac.id/index.php/jollt/article/view/4995