Ramury, Feli, Gustina Gustina, and Agustiany Dumeva Putri. 2020. “Pengembangan Lembar Kerja Siswa Berbasis Problem Based Learning (PBL) Pada Materi Penerapan Barisan Dan Deret”. Jurnal Pendidikan Matematika RAFA 6 (1): 85-99. https://doi.org/10.19109/jpmrafa.v6i1.5890.