Sitorus, Syafriana. “The Effectiveness of the ‘COVID19 Origin Response and Resilience Initiative (CORRI)’ Program Involving Private Sector in Humbang Hasundutan District, North Sumatera”. BKM Public Health and Community Medicine00 (April 21, 2021). Accessed November 23, 2024. https://journal.ugm.ac.id/v3/BKM/article/view/1668.