Sinambela, N. (2022) “Development of Learning Materials and Media for Vocational Competency Basic Subjects in Class X Audio Video Engineering in SMK Negeri 2 Samarinda”, Educationist: Journal of Educational and Cultural Studies, 1(1), pp. 275–286. Available at: https://jurnal.litnuspublisher.com/index.php/jecs/article/view/153 (Accessed: 7 October 2025).