Trieni, Pultion. “The Difficulties of Students in Learning Mathematics by Using Development Learning Sequences Approach in Sd Negeri No. 08 Koto Barapak Kecamatan Bayang”. Jurnal Ilmiah Pendidikan Scholastic 2, no. 1 (March 19, 2018): 39–49. Accessed December 22, 2024. https://e-journal.sastra-unes.com/index.php/JIPS/article/view/307.