Ramdan, Iwan Muhamad, Krishna Purnawan Candra, and Ulfah Rana Mahdiyyah. “Fatigue on Oil Refinery Workers and Related Factors”. Open Access Macedonian Journal of Medical Sciences 9, no. E (October 5, 2021): 887–894. Accessed April 26, 2024. https://oamjms.eu/index.php/mjms/article/view/6879.