Radityo, Bayu Adi. “The Implementation of Sort, Set in Order, Shine, Standardize, and Sustain As Occupational Accident Preventions at PT X”. The Indonesian Journal of Occupational Safety and Health 8, no. 3 (December 27, 2019): 292–301. Accessed July 21, 2024. https://e-journal.unair.ac.id/IJOSH/article/view/8702.