Mikhael Sihombing, Farihah, and Efendi Napitupulu. “Study of Effectiveness of Multimedia-Based Interactive Learning at Nila Harapan Deli Serdang Vocational High School”. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE 4, no. 1 (January 5, 2018): 112–117. Accessed April 30, 2024. https://ijasre.net/index.php/ijasre/article/view/92.