Alzani Ulfa, and Nurmayani. “PENGEMBANGAN BAHAN AJAR E-BOOK INTERAKTIF BERBASIS PROBLEM BASED LEARNING (PBL) PADA TEMA 7 DI KELAS V SD NEGERI 106804 PERCUT”. Jurnal Pendidikan Sosial Dan Humaniora, vol. 2, no. 4, Oct. 2023, pp. 10842-5, https://publisherqu.com/index.php/pediaqu/article/view/558.