Fahrul Rozi, Humisar Sihombing, Abdul Hamid K, Keysar Panjaitan, and Kornelius Harefa. “Development Of Project Based Learning-Based Video Tutorials in Vocation High School”. International Journal of Economic, Technology and Social Sciences (Injects) 3, no. 1 (November 11, 2022): 259–262. Accessed August 8, 2025. https://jurnal.ceredindonesia.or.id/index.php/injects/article/view/779.