INVESTIGATING GRAMMATICAL PROBLEMS FACED BY THE SEVENTH SEMESTER STUDENTS OF STKIP ABDI PENDIDIKAN PAYAKUMBUH IN WRITING INTRODUCTION CHAPTER OF RESEARCH PROPOSAL. EXPOSURE : JURNAL PENDIDIKAN BAHASA INGGRIS, [S. l.], v. 11, n. 1, p. 16–30, 2022. DOI: 10.26618/exposure.v11i1.7121. Disponível em: https://journal.unismuh.ac.id/index.php/exposure/article/view/7121. Acesso em: 23 aug. 2025.