Ariza Guswan, F., and Usmeldi. “Dampak Penerapan Model Problem Based Learning Terhadap Hasil Belajar Siswa Pada Mata Pelajaran Dasar Listrik Dan Elektronika Di Smk Negeri 1 Pariaman”. Ranah Research : Journal of Multidisciplinary Research and Development, Vol. 2, no. 2, Jan. 2020, pp. 38 -43, https://jurnal.ranahresearch.com/index.php/R2J/article/view/226.