Simanjuntak SD, Imelda . Lembar Kertas Kerja Peserta Didik Matematika Kelas 8 SMP Berbasis Budaya Batak Toba Sesuai Kurikulum 2013. JPB [Internet]. 2018 Oct. 30 [cited 2025 Oct. 30];:i-246. Available from: http://book.penerbit.org/index.php/JPB/article/view/119