Wichadee, Saovapa. “A Development of the Blended Learning Model Using Edmodo for Maximizing Students’ Oral Proficiency and Motivation”. International Journal of Emerging Technologies in Learning (iJET) 12, no. 02 (February 28, 2017): pp. 137–154. Accessed January 19, 2022. https://online-journals.org/index.php/i-jet/article/view/6324.