Orlando R.B, Rendy, Disabella Dayera, and Benyamin Tangaran. “Analisa Kerusakan Hydraulic Cylinder Boom Pada Unit Excavator Kobelco Sk200-10”. Jurnal Pendidikan Tambusai 6, no. 2 (July 17, 2022): 14571–14579. Accessed January 15, 2025. http://jptam.org/index.php/jptam/article/view/4734.