Saputra, Deni Dwi, and Andeka Rocky Tanaamah. “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, no. 2 (August 1, 2021): 1076-1086. Accessed July 17, 2026. https://www.iocscience.org/ejournal/index.php/mantik/article/view/1461.