Sindu, I. G. P., & Paramartha, A. A. G. Y. (2018). The effect of problem-based e-learning content on the learning achievement in basic computer system course (DSK) of the student of informatics engineering education department. Jurnal Pendidikan Vokasi, 8(1), 24–32. https://doi.org/10.21831/jpv.v8i1.18098