Saputra, D. D., & Tanaamah, A. R. (2021). Optimizing the Use of QR Codes in Web-Based Attendance Information Systems During the Covid-19 Pandemic (Case Study: KONI Salatiga City). Jurnal Mantik, 5(2), 1076-1086. https://doi.org/10.35335/jurnalmantik.Vol5.2021.1461.pp1076-1086