Azzahra, Z., and P. A. . Siregar. “ANALYSIS OF THE EFFECT OF LONG USING GADGETS BEFORE SLEEPING WITH INSOMNIA SYMPTOMS IN ADOLESCENTS”. Indonesian Journal of Public Health, vol. 2, no. 1, Mar. 2024, pp. 80-85, https://jurnal.academiacenter.org/index.php/IJOH/article/view/295.