Hazmi, Deni. “Perkembangan Kognitif Anak Menurut Teori Piaget”. Mimbar Kampus: Jurnal Pendidikan dan Agama Islam 22, no. 2 (March 7, 2023): 412-419. Accessed April 12, 2025. https://journal.laaroiba.com/index.php/mk/article/view/3018.