Lumbantoruan, Jitu Halomoan. “PENGEMBANGAN BAHAN AJAR INTEGRAL TAK TENTU BERBASIS MODEL SMALL GROUP DISCUSSION DI PROGRAM STUDI PENDIDIKAN MATEMATIKA FKIP UKI TAHUN 2016/2017”. Jurnal Dinamika Pendidikan 10, no. 2 (January 26, 2018): 99-118. Accessed October 15, 2024. http://ejournal.uki.ac.id/index.php/jdp/article/view/610.