Amir, Amir Kamal. “Gelanggang Evalusi Dan Sifat-Sifatnya”. Jurnal Matematika, Statistika dan Komputasi 5, no. 1 (January 31, 2018): 52-57. Accessed April 11, 2025. http://journal-old.unhas.ac.id/index.php/jmsk/article/view/3341.