Ravi, A., and B. S. E. Polonia. “The Use Emb (Engineering Mechanics Book) Mobile App To Train Students’ Digital Literacy Skills During Covid-19 Pandemic”. Tarbiyah : Jurnal Ilmiah Kependidikan, vol. 10, no. 2, Jan. 2022, pp. 103-14, doi:10.18592/tarbiyah.v10i2.5542.