TANJUNG, J. P.; WIJAYA, B. A. Facial Recognition Implementation using K–NN and PCA Feature Extraction in Attendance System. Sinkron : jurnal dan penelitian teknik informatika, [S. l.], v. 5, n. 1, p. 43-50, 2020. DOI: 10.33395/sinkron.v5i1.10612. Disponível em: https://jurnal.polgan.ac.id/index.php/sinkron/article/view/10612. Acesso em: 7 oct. 2025.