Affandi, Luqman, Ekojono, and Ahmad Rizaldi. “SISTEM PRESENSI MENGGUNAKAN NFC SMARTPHONE ANDROID DAN RASPBERRY PI (STUDI KASUS POLITEKNIK NEGERI MALANG)”. Jurnal Informatika Polinema 6, no. 3 (May 28, 2020): 75–82. Accessed September 13, 2025. http://114.6.41.75/index.php/jip/article/view/2659.