Ghozali, Fanani Arief, Rustam Asnawi, M Khairudin, Mentari P Jati, and Ahmad Hoirul. “Designing a Skill Tree Model for Learning Media”. Jurnal Pendidikan Teknologi dan Kejuruan 25, no. 1 (April 10, 2019): 132–140. Accessed May 14, 2025. https://jurnal.uny.ac.id/index.php/jptk/article/view/20234.