Saifullah, S., and Y. Okvitasari. “Training For Making Herb Curcuma (Curcuma Xanthorrhiza Roxb) To Improve The Resistance Of The Body In The Pandemic Time Covid-19”. Prosiding Pengembangan Masyarakat Mandiri Berkemajuan Muhammadiyah (Bamara-Mu), vol. 1, no. 1, Sept. 2021, pp. 197-05, https://proceeding.mbunivpress.or.id/index.php/bamara/article/view/42.