Hidayati, N. A. ., A. . Darmuki, M. . Widayati, G. . Mareta, and N. . Sahida. “Comparative Study Analysis of the Use of Whatsapp and Schoology on Learning Outcomes in Emergency Times”. ANP Journal of Social Science and Humanities , vol. 2, no. 1, Apr. 2021, pp. 122-7, doi:10.53797/anpjssh.v2i1.21.2021.