Silaban, Ayu Marida, Kerdid Simbolon, and Jitu Halomoan Lumbantoruan. “Kesulitan Siswa Dalam Memecahkan Masalah Barisan Dan Deret Aritmatika”. Brillo Journal 1, no. 2 (June 30, 2022): 95–101. Accessed May 12, 2025. https://journal.sncopublishing.com/index.php/brillojournal/article/view/14.