Irnanda, N. P., and A. S. Awalin. “GRAMMATICAL ERROR ANALYSIS: A STUDY ON STUDENTS’ SCIENTIFIC ABSTRACTS”. Synergy : Jurnal Ilmiah Multidisiplin, vol. 2, no. 02, Dec. 2024, pp. 102-7, https://e-journal.naureendigition.com/index.php/sjim/article/view/1696.