Purba, Koleta A.A, Sahlan Tampubolon, Celine I Hutagalung, and Fitriwan J Pandiangan. “An Error Analysis in Writing Short Essay Made by the First Semester Students English Department Nommensen University”. Jurnal Pendidikan Tambusai 6, no. 1 (April 7, 2022): 4296–4301. Accessed February 6, 2025. http://jptam.org/index.php/jptam/article/view/3532.