Prasetyanti, D. K. ., Santosa, P. I. . and Winarno, W. W. . (2021) “Usability Testing for E-commerce Taxpayers in the era of Industrial Revolution 4.0”, Prosiding SEMNAS INOTEK (Seminar Nasional Inovasi Teknologi), 3(1), pp. 031–038. doi: 10.29407/inotek.v3i1.510.