Özer, Hasan Huseyin, et al. “Effects of the Gamification Supported Flipped Classroom Model on the Attitudes and Opinions Regarding Game-Coding Education”. International Journal of Emerging Technologies in Learning (iJET), vol. 13, no. 01, Jan. 2018, pp. pp. 109-123, doi:10.3991/ijet.v13i01.7634.