Silaban, H. (2022) “English Teaching Learning by Leveling System Model on Class XI of Vocational High School 3 Samarinda Students”, Educationist: Journal of Educational and Cultural Studies, 1(2), pp. 234–241. Available at: https://jurnal.litnuspublisher.com/index.php/jecs/article/view/77 (Accessed: 14 May 2026).