Sriadi, Yosua Natanael. “Investigation of Covid-19 Transmission at a Digital Service Company, Sleman Distric, 2020 - a Case Report Study”. Berita Kedokteran Masyarakat00 (April 21, 2021). Accessed January 18, 2026. https://journal.ugm.ac.id/v3/BKM/article/view/1640.