Lestari, Ayu Dwi, and Hita Paulina Siregar. “ANALISIS BUTIR SOAL MATEMATIKA BUATAN GURU SMP NEGERI 1 MEMPURA”. Pi: Mathematics Education Journal 2, no. 1 (April 1, 2019): 26–33. Accessed January 31, 2026. http://ejournal.unikama.ac.id/index.php/pmej/article/view/2837.