Djoko Dwiyogo W, Ligya Radjah C. Effectiveness, Efficiency and Instruction Appeal of Blended Learning Model. Int. J. Onl. Eng. [Internet]. 2020 Apr. 8 [cited 2024 Apr. 19];16(04):pp. 91-108. Available from: https://online-journals.org/index.php/i-joe/article/view/13389