Wijaya, Alberik, Gracia Nugraheni, and Barli Bram. “GRAMMATICAL ERRORS IN UNDERGRADUATE STUDENTS’ RESEARCH PROPOSAL WRITING”. Jurnal Bahasa Lingua Scientia 11, no. 2 (November 15, 2019): 291-308. Accessed June 19, 2025. http://ejournal.iain-tulungagung.ac.id/index.php/ls/article/view/1854.