Safitri, S., and Y. Okvitasari. “Responded to the Covid-19 Outbreak With Gratitude”. Prosiding Pengembangan Masyarakat Mandiri Berkemajuan Muhammadiyah (Bamara-Mu), vol. 1, no. 1, Sept. 2021, pp. 579-82, https://proceeding.mbunivpress.or.id/index.php/bamara/article/view/54.