KUSNADI, Adhi. Earned Value Management (EVM) dalam Estimasi Biaya Proyek Piranti Lunak Menggunakan Spiral Development. Ultima InfoSys : Jurnal Ilmu Sistem Informasi, [S. l.], v. 6, n. 1, p. 36–42, 2015. DOI: 10.31937/si.v6i1.277. Disponível em: https://ejournals.umn.ac.id/index.php/SI/article/view/277. Acesso em: 18 may. 2025.