Agus Firmanda, Yocky, Wateno Oetomo, and Esti Wulandari. “Value Engineering For Drainage System Planning On Soekarno Hatta Road Malang City”. Devotion : Journal of Research and Community Service 3, no. 14 (December 29, 2022): 2707–2725. Accessed August 1, 2026. https://www.devotion.greenvest.co.id.submitjurnal.id/index.php/dev/article/view/331.