Yücel, Emin Erinç, and Barış Önen Ünsalver. “The Relationship Between Smartphone Using Style and Sleep Quality and Psychiatric Symptoms Among a Foundation University Students”. The European Research Journal 6, no. 6 (November 3, 2020): 569–579. Accessed July 7, 2026. https://www.eurj.org.tr/article/view/390.