INVESTIGATING CAUSES OF GRAMMATICAL ERRORSIN WRITING NARRATIVE  TEXT AT ELEVENTH GRADE OF SMA NEGERI 1 SIANTAN. Journal of English Language Teaching and Education (JELTE) [Internet]. 2024 Oct. 7 [cited 2025 Mar. 9];5(2):78-8. Available from: https://jurnal.fpbs.ikippgriptk.ac.id/index.php/jelte/article/view/1091