Frans, John H., Aret E. Nesimnasi, and Wilhelmus Bunganaen. “PERENCANAAN DRAINASE KAWASAN UNDANA MENGGUNAKAN PROGRAM AUTO CAD CIVIL 3D DAN GLOBAL MAPPER”. Jurnal Teknik Sipil 9, no. 2 (September 30, 2020): 193-206. Accessed August 19, 2025. https://sipil.ejournal.web.id/index.php/jts/article/view/360.