NUGRAHANINGRUM, R.; WATI, T. L. Teacher Implementation in the Mumtaz Smart Application during the Covid-19 Pandemic in Elementary Schools: Implementasi Guru dalam Aplikasi Mumtaz Smart dimasa Pandemi Covid-19 di Sekolah Dasar. Indonesian Journal of Education Methods Development, v. 17, n. 4, p. 10.21070/ijemd.v20i.663, 21 Nov. 2022.