Sa’adah N, Khamdun, Setiadi G. Development of IPAS Textbooks Based on Problem Based Learning Model Grade V Students of Elementary Schools in Gebog Sub-District. ICCCM JSSH [Internet]. 2026 May 6 [cited 2026 May 7];5(3):55-63. Available from: https://ejicccm.com/index.php/icccmjssh/article/view/364