Purba, R. A. and Sondang, S. (2022) “Design and Build Monitoring System for Pregnant Mothers and Newborns using the Waterfall Model”, INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi, 6(1), pp. 29-42. doi: 10.29407/intensif.v6i1.16085.