1.
Rahman A, Pratiwi NTM, Hariyadi S. Struktur Komunitas Fitoplankton di Danau Toba, Sumatera Utara. J. Ilmu. Pertan. Indones. [Internet]. 2017Aug.31 [cited 2020Aug.5];21(2):120-7. Available from: http://jurnal.ipb.ac.id/index.php/JIPI/article/view/13097