“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, doi: 10.29244/jp2wd.2021.5.3.174-186.