Hutabarat, Sylvia Margareth, Sukarman Purba, and Saut Purba. “Optimizing Vocational students’ Skills through Adaptive Online Courses”. Cendikia : Media Jurnal Ilmiah Pendidikan 14, no. 6 (July 31, 2024): 662-667. Accessed August 7, 2026. https://iocscience.org/ejournal/index.php/Cendikia/article/view/5355.