Amir, Amir Kamal. “Gelanggang Evalusi Dan Sifat-Sifatnya”. Jurnal Matematika, Statistika dan Komputasi 12, no. 2 (February 4, 2018): 98-104. Accessed April 15, 2024. https://journal.unhas.ac.id/index.php/jmsk/article/view/3462.