Sirait, Abadihon Fazli, and Mara Samin Lubis. “Pocket Book Design Based On Mathematical Puzzles To Improve The Mathematical Logical Intelligence Of Grade XI Students”. Mathline : Jurnal Matematika dan Pendidikan Matematika 8, no. 1 (February 17, 2023): 68–85. Accessed March 10, 2025. https://mathline.unwir.ac.id/index.php/Mathline/article/view/378.