Romiyanti, E., and A. G. Nugroho. “Utilization Of Peper Betle Lin and Citrus Aurantifolia S. As a HandSanitizer and How Use to Them in Desa Danda Jaya Kecamatan Rantau Badauh”. Prosiding Pengembangan Masyarakat Mandiri Berkemajuan Muhammadiyah (Bamara-Mu), vol. 1, no. 1, Sept. 2021, pp. 403-8, https://proceeding.mbunivpress.or.id/index.php/bamara/article/view/140.