Utama, Hannisa Yanuar. “Utilization Of Electronic Reminder Method On Enhancement Hazard Reporting Cards In Oil & Gas Company X”. Journal of Public Health Research and Community Health Development 4, no. 2 (March 4, 2021): 107–121. Accessed August 15, 2024. https://e-journal.unair.ac.id/JPHRECODE/article/view/21559.