Maulina, Sri, Muchtadi Muchtadi, and Hartono Hartono. “Analisis Kesulitan Pemahaman Konseptual Siswa Dalam Materi Aljabar Berdasarkan Teori APOS”. Indo-MathEdu Intellectuals Journal 6, no. 1 (February 9, 2025): 1337–1353. Accessed May 12, 2025. https://ejournal.indo-intellectual.id/index.php/imeij/article/view/2672.