Refdinal, Refdinal, Junil Ardi, and Purwantono Purwantono. “Welding Competence Training at Dropout Youth”. Teknomekanik 2, no. 1 (June 2, 2019): 29-38. Accessed April 28, 2024. http://teknomekanik.ppj.unp.ac.id/index.php/teknomekanik/article/view/40.