Firdaus, Hendi, Syafrizal, and Lukman Nulhakim. “Electronic Teaching Materials to Improve Student Learning Effectiveness Automotive Vocational High School”. Jurnal Penelitian Pendidikan IPA 10, no. 11 (November 25, 2024): 9791–9798. Accessed December 13, 2025. https://jppipa.unram.ac.id/index.php/jppipa/article/view/7338.