M. Dzaki Sholihin, Liana Pertiwi, Yani Lubis. Student’s Mastery Of Grammar In Simple Present Tense. Qwt [Internet]. 2023 Nov. 30 [cited 2024 Sep. 20];1(2):146-5. Available from: https://quality.pdfaii.or.id/index.php/i/article/view/33