SILABAN, H. English Teaching Learning by Leveling System Model on Class XI of Vocational High School 3 Samarinda Students. Educationist: Journal of Educational and Cultural Studies, [S. l.], v. 1, n. 2, p. 234–241, 2022. Disponível em: https://jurnal.litnuspublisher.com/index.php/jecs/article/view/77. Acesso em: 14 may. 2026.