LubisE. N., PravitasariA. E., and BaskoroD. P. T., “Indeks Pembangunan Berkelanjutan Lokal dan Sebaran Spasialnya di Kabupaten Mandailing Natal, Provinsi Sumatera Utara: Local Sustainable Development Index and Its Spatial Distribution in Mandailing Natal Regency, North Sumatera Province”, JP2WD, vol. 5, no. 3, pp. 174-186, Oct. 2021.