Muhtadi, A. et al. 2026. Water Quality Conditions and Trophic Status of Lake Toba, North Sumatra,Indonesia: Implications for Lake Management. Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management). 16, 3 (May 2026), 313. DOI:https://doi.org/10.29244/jpsl.16.3.313.