“Penerapan Coloring Graph Pada Sistem Pengingat dan Penjadwalan Imunisasi Dasar Lengkap”, CESS (Journal of Computer Engineering, System and Science), vol. 3, no. 2, hlm. 128–133, Agu 2018, Diakses: 26 Juni 2026. [Daring]. Tersedia pada: https://jurnal.unimed.ac.id/2012/index.php/cess/article/view/9895