Hartanto, Suryo, and Ratih Fordiana. “Learning Needs Analysis of Vocational High School`S Chemical Subjects in Mechanical Engineering Department”. International Journal of Engineering and Technology 7, no. 3.25 (April 25, 2026): 656–658. Accessed April 29, 2026. https://www.sciencepubco.com/index.php/IJET/article/view/17818.