LEIDONALD, Rusdi; MUHTADI, Ahmad; ASHSHIDDIQ, Muhammad Arif; SIAHAAN, Vania S.P; MANURUNG, Bunga Ulita. Water Quality Degradation in the Deli River Watershed, North Sumatra: Impacts of Land Use and Pollution Sources. Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Bogor, ID, v. 15, n. 4, p. 669, 2025. DOI: 10.29244/jpsl.15.4.669. Disponível em: https://journal.ipb.ac.id/jpsl/article/view/56571. Acesso em: 9 jan. 2026.