Ridhani, Akhmad. “Occupational Health Services As an Effort to Increase the Health of Workers at PT Petrokimia Gresik During the Covid-19 Pandemic”. Nautical : Jurnal Ilmiah Multidisiplin Indonesia 1, no. 12 (March 25, 2023): 899–905. Accessed November 30, 2024. https://jurnal.arkainstitute.co.id/index.php/nautical/article/view/490.