Nasrullah A, Marlina M, Dwiyanti W. Development of Student Worksheet-Based College E-Learning Through Edmodo to Maximize the Results of Learning and Motivation in Economic Mathematics Learning. Int. J. Emerg. Technol. Learn. [Internet]. 2018 Dec. 20 [cited 2024 Nov. 22];13(12):pp. 211-229. Available from: https://online-journals.org/index.php/i-jet/article/view/8636