Ahdiyat, A., and I. . Daud. “Proper Cough or Sneezing Ethics”. Prosiding Pengembangan Masyarakat Mandiri Berkemajuan Muhammadiyah (Bamara-Mu), vol. 1, no. 1, Sept. 2021, pp. 486-8, https://proceeding.mbunivpress.or.id/index.php/bamara/article/view/255.