Himayati, N., T. Joko, and M. Raharjo. “The Study of Risk Management Solid Medical Waste Management at Hospital X Covid-19 Referral in Semarang City ”. International Journal of Health, Education & Social (IJHES), Vol. 4, no. 11, Nov. 2021, pp. 38-46, doi:10.1234/ijhes.v4i11.207.