Martha A Lumbantoruan, Niko Surya Atmaja, and Rico Imanta Ginting. “Perancangan Sistem Informasi Absensi Pegawai Menggunakan Qr Code Dan Linear Congruent Method Berbasis Web: Studi Kasus : SMP Perguruan Ira”. Jurnal Ilmiah Teknik Mesin, Elektro dan Komputer 6, no. 2 (July 17, 2026): 395–411. Accessed July 25, 2026. https://journalcenter.org/index.php/JURITEK/article/view/7576.