Prastiyono H, Utaya S, Sumarmi S, Astina IK, Amin S, Aliman M. Development of E-Learning, Mobile Apps, Character Building, and Outdoor Study (EMCO Learning Model) to Improve Geography Outcomes in the 21st Century. Int. J. Interact. Mob. Technol. [Internet]. 2021 Apr. 9 [cited 2024 Apr. 19];15(07):pp. 107-122. Available from: https://online-journals.org/index.php/i-jim/article/view/21553