Rahman, Arif, PratiwiNiken Tunjung Murti, and Sigid Hariyadi. “Struktur Komunitas Fitoplankton Di Danau Toba, Sumatera Utara”. Jurnal Ilmu Pertanian Indonesia 21, no. 2 (August 31, 2017): 120-127. Accessed April 20, 2024. https://jurnal.ipb.ac.id/index.php/JIPI/article/view/13097.