Chrisdiyanto, Endar, Zudhy Nur Alfian, and Aji Pangestu. “Developing Mathematical Problem-Based Learning Devices on Social Aritmetic Topic to Improve Creative Thinking Skills of Junior High Schools Students”. Proceeding International Conference on Science and Engineering 3 (April 30, 2020): 329–334. Accessed August 23, 2026. http://sunankalijaga.org/prosiding/index.php/icse/article/view/522.