Syofyan, Harlinda, Zulela MS, and M Syarif Sumantri. “PENGEMBANGAN AWAL BAHAN AJAR IPA DI SEKOLAH DASAR”. Jurnal Pendidikan Dasar 10, no. 1 (May 31, 2019): 52-67. Accessed April 26, 2024. https://journal.unj.ac.id/unj/index.php/jpd/article/view/11266.