“PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING BERBANTUAN POP-UP BOOK TERHADAP HASIL BELAJAR IPAS” (2024) Jurnal Inovasi Sekolah Dasar, 1(5). Tersedia pada: https://jurnal.unimed.ac.id/2012/index.php/jisd/article/view/63018 (Diakses: 17 Agustus 2026).