Sari, L. M. I., Hatta, P., Wihidayat, E. S., & Xiao, F. (2018). A Comparison between the Use of Cisco Packet Tracer and Graphical Network Simulator 3 as Learning Media on Students’ Achievement. Jurnal Pendidikan Teknologi Dan Kejuruan, 24(1), 132–136. https://doi.org/10.21831/jptk.v24i1.16042