Kristiawati, K., Wangsa, A., Fatmasari, P. dan Usman, M. R. (2023) “Mathematics smart books based on QR Code as a digital learning media material limit function”, Math Didactic: Jurnal Pendidikan Matematika, 9(2), hlm. 185-198. doi: 10.33654/math.v9i2.2128.