Sacal PGY, Potane JD. Students’ Mastery of English Grammar towards Effective Writing and Speaking Competence. Int. J. Multidiscip. Appl. Bus. Edu. Res. [Internet]. 2023 Aug. 25 [cited 2026 Jan. 23];4(8):2894-90. Available from: https://ijmaberjournal.org/index.php/ijmaber/article/view/1251