Labib, R. P. M. D., Hadi, S., & Widayaka, P. D. (2021). Low Cost System for Face Mask Detection Based Haar Cascade Classifier Method. MATRIK : Jurnal Manajemen, Teknik Informatika Dan Rekayasa Komputer, 21(1), 21-30. https://doi.org/10.30812/matrik.v21i1.1187