Ulfah AF, Prahmana RCI. Single Subject Research: Implementasi Pembelajaran Berbasis Masalah terhadap Pemahaman Matematis Siswa. J. Elemen [Internet]. 2018 Jan. 25 [cited 2024 Nov. 24];4(1):105-18. Available from: https://e-journal.hamzanwadi.ac.id/index.php/jel/article/view/553