Erika Febriyanti, et al. “THE RELATIONSHIP BETWEEN SMARTPHONE USE INTENSITY AND THE DEVELOPMENT OF CHILDREN AGED 4-6 YEARS IN KINDERGARTEN”. Akrab Juara : Jurnal Ilmu-Ilmu Sosial, vol. 11, no. 1, Feb. 2026, pp. 48-58, https://www.akrabjuara.com/index.php/akrabjuara/article/view/2720.