Ananda, M. R., and S. Suparno. “PENGARUH MEDIA PEMBELAJARAN VIDEO TUTORIALTERHADAP HASIL BELAJAR TEKNIK PEMESINAN BUBUT KELAS XI DI SMK NEGERI 1 BUKITTINGGI”. Ranah Research : Journal of Multidisciplinary Research and Development, Vol. 1, no. 4, July 2019, pp. 744-9, https://ranahresearch.com/index.php/R2J/article/view/123.