Hikmah, N., and H. M. Caesarina. “Utilization of Natural Plants As Herbal Drinks to Increase Immunity in Tanjung Pagar Village”. Prosiding Pengembangan Masyarakat Mandiri Berkemajuan Muhammadiyah (Bamara-Mu), vol. 1, no. 1, Sept. 2021, pp. 751-8, https://proceeding.mbunivpress.or.id/index.php/bamara/article/view/31.