Parsaoran Tamba, Saut, Alvin Purba, Yogga Eka Kusuma, Mang Ayu Santi Vidyastuti, and Surya Dharma. 2021. “IMPLEMENTATION OF THE RANK ORDER CENTROID (ROC) METHOD TO DETERMINE THE FAVORITE BETTA FISH”. INFOKUM 9 (2, June), 381-86. http://seaninstitute.org/infor/index.php/infokum/article/view/139.