Handayani, E., M. Raharjo, and Y. H. Darundiati. “Microbial Risk Assessment Of Indoor Airbone Microbe In The Community Health Center In Semarang City”. International Journal of Health, Education & Social (IJHES), Vol. 3, no. 7, July 2020, pp. 16-26, doi:10.1234/ijhes.v3i7.99.