Sukismanto, S., H. Hartono, S. Sumardiyono, and T. R. Andayani. “Social Support Role of Occupational Safety and Health Implementation in Informal Sector During COVID-19 Pandemic”. International Journal of Health Sciences, vol. 5, no. 3, Nov. 2021, pp. 416-28, doi:10.53730/ijhs.v5n3.1746.