Wilantara, Bahtiar. “Efektivitas Problem Based Learning Untuk Peningkatan Kompetensi Sistem Starter Di Sekolah Menengah Kejuruan”. Automotive Experiences 1, no. 02 (August 31, 2018): 47–52. Accessed October 11, 2026. https://journal.unimma.ac.id/AutomotiveExperiences/article/view/2248.