Leo, Jeanette Rachel Audrey, et al. “The Relationship Between Smartphone Addiction and Sleep Quality Among 2016 Freshmen in The Faculty of Medicine at Pelita Harapan University”. Jurnal Sehat Indonesia (JUSINDO), vol. 8, no. 2, Aug. 2026, pp. 721-32, doi:10.59141/-.v8i2.568.