Wicaksono, Herdy Perdana. “Implementation of Installation and Maintenance Portable Fire Extinguisher in Circuit Breaker Manufacture”. The Indonesian Journal of Occupational Safety and Health 9, no. 1 (April 30, 2020): 30–38. Accessed August 5, 2024. https://e-journal.unair.ac.id/IJOSH/article/view/13325.