Alhalafawy, W.S. and Zaki, M.Z. 2019. The Effect of Mobile Digital Content Applications Based on Gamification in the Development of Psychological Well-Being. International Journal of Interactive Mobile Technologies (iJIM). 13, 08 (Aug. 2019), pp. 107–123. DOI:https://doi.org/10.3991/ijim.v13i08.10725.