Sinaga, Agnes, Errason Pandiangan, Ester Sinurat, Ika Anggi, Riki Rahmat, and Eni Yuniastuty. 2026. “Upaya Mengurangi Pencemaran Sungai Denai”. Pelita : Jurnal Penelitian Dan Karya Ilmiah 26 (2):246-50. https://doi.org/10.33592/pelita.v26i2.7553.