Ustafiano, B., and W. Purwanto. “PENGARUH MOTIVASI DAN KEMANDIRIAN BELAJAR SISWA TERHADAP HASIL BELAJAR PERAWATAN MESIN KENDARAAN RINGAN DI SMK MUHAMMADIYAH 1 PADANG”. Ranah Research : Journal of Multidisciplinary Research and Development, Vol. 1, no. 2, Jan. 2019, pp. 234-41, https://jurnal.ranahresearch.com/index.php/R2J/article/view/45.