Sinaga, Christa Voni Roulina, and Yanti Maria Marbun. “Pengaruh Pendekatan Contextual Learning Dan Perhatian Pada Interaksi Kelas Terhadap Kemampuan Pemecahan Masalah Matematika”. Journal of Education Research 5, no. 4 (November 8, 2024): 5308–5314. Accessed September 9, 2025. https://www.jer.or.id/index.php/jer/article/view/1736.