Asmidar Parapat, Zannatunnisya, Rika Widya, Almanah Rambe. Children’s Problem Solving Abilities In Pattern Play Material. IJSL [Internet]. 2024 Nov. 26 [cited 2025 Apr. 27];2(3):250-5. Available from: https://journal.ysmk.or.id/index.php/IJSL/article/view/344