Hilalina, N., and Mira. “Optimization Building Spirit in Education in the New Normal Era of the COVID-19 Pandemic in 2021”. Prosiding Pengembangan Masyarakat Mandiri Berkemajuan Muhammadiyah (Bamara-Mu), vol. 1, no. 1, Sept. 2021, pp. 395-02, https://proceeding.mbunivpress.or.id/index.php/bamara/article/view/203.