Azmiyannoor, Muhammad. “Communication, Education and Information about Coronavirus Disease (COVID-19) Online through the Whatsapp Group Network”. BKM Public Health and Community Medicine 37, no. 11 Suppl. (November 7, 2021). Accessed May 5, 2024. https://jurnal.ugm.ac.id/v3/BKM/article/view/3325.