Usman, Muhammad, and Muhamad Gustalika. 2022. “Pengujian Validitas Dan Reliabilitas System Usability Scale (SUS) Untuk Perangkat Smartphone”. Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) 9 (1), 19-24. https://doi.org/10.33019/jurnalecotipe.v9i1.2805.