Rahayu, Sri, Euis Nur Aisyah, and Ardya Kirana. “Pemanfaatan QR Code Dan Framework Codeigniter Pada Aplikasi Sistem Informasi Presensi”. Journal Sensi: Strategic of Education in Information System 10, no. 1 (February 28, 2024): 90-98. Accessed October 12, 2025. https://ejournal.raharja.ac.id/index.php/sensi/article/view/3120.