Dr. Özlem ÇAKIR, Dr. Burhanettin OZDEMIR, Dr. Irshad HUSSAIN, and Dr. Muzammila AKRAM, “Investigating The Effect of Facebook Addiction on Students` Happiness Mediated by Nomophobia Across Countries: MultiGroup MIMIC Approach”, Elementary Education Online, vol. 20, no. 1, pp. 8027–8047, Mar. 2021.