Hamzah, M. L., Pabottingi, M. A., Saputra, E., Anofrizen, A. and Sutoyo, S. (2021) “Rancang Bangun Sistem Informasi Surat Menyurat Berbasis Web Pada PT. Radar Riau”, INTECOMS: Journal of Information Technology and Computer Science, 4(1), pp. 9 - 19. doi: https://doi.org/10.31539/intecoms.v4i1.2221.