Adelia Fairiza Putri, Cindy Aulia Amanda, Zidanul Akbar, Ziyad Habibul Mikraj. Sistem Informasi Surat Elektronik Badan Diklat Keagamaan Kota Medan Berbasis Web Menggunakan Penegembangan Waterfall. Polygon [Internet]. 2025 May 30 [cited 2026 Jul. 19];3(3):33-41. Available from: https://journal.arimsi.or.id/index.php/Polygon/article/view/302