Putri, Aisya Nabila, et al. “Penerapan Pendekatan Contextual Teaching and Learning (CTL) Terhadap Pemahaman Konsep Matematika Melalui Penerapan Media Kartu Soal Di SMK Negeri 4 Medan”. Jurnal Pendidikan Tambusai, vol. 9, no. 1, Jan. 2025, pp. 2038-43, http://jptam.org/index.php/jptam/article/view/24596.