Simanjuntak, Sinta Dameria, and . Imelda. “Lembar Kertas Kerja Peserta Didik Matematika Kelas 8 SMP Berbasis Budaya Batak Toba Sesuai Kurikulum 2013”. Jayapangus Press Books (October 30, 2018): i–246. Accessed April 4, 2025. http://book.penerbit.org/index.php/JPB/article/view/119.