“PENGEMBANGAN BIG BOOK SEKOLAH DASAR”. Tunjuk Ajar : Jurnal Penelitian Ilmu Pendidikan 4, no. 1 (February 28, 2021): 86–95. Accessed October 7, 2025. https://jta.ejournal.unri.ac.id/index.php/JTA/article/view/217.