Romiyanti, Esty, and Arif Ganda Nugroho. 2021. “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) 1 (1):403-8. https://proceeding.mbunivpress.or.id/index.php/bamara/article/view/140.