Febriani, Dwi Rizqiatus Shoumi, Mochamad Widjanarko, and Erik Aditia Ismaya. “The Development of Student Activities Sheet Based on The Problem-Based Learning Model of Social Science Learning Class IV Elementary School”. ICCCM Journal of Social Sciences and Humanities 1 (September 11, 2022): 1–6. Accessed April 26, 2024. https://ejicccm.com/index.php/icccmjssh/article/view/38.