Muryanto, Irwan. “Deaths Due to Covid-19 in Rokan Hulu Regency: Descriptive Epidemiological Studies: Studi Epidemiologi Deskriptif”. Jurnal Kesehatan Komunitas (Journal of Community Health), vol. 7, no. 3, Dec. 2021, pp. 381-6, doi:10.25311/keskom.Vol7.Iss3.1047.