Suryo Hartanto, Shalehoddin, Asrul Huda, Reza Nandika. “The Effectiveness of Lean -Based Learning Model to Improve Work Skills of Vocational High School Students”. Annals of the Romanian Society for Cell Biology (March 27, 2021): 4620–4626. Accessed May 6, 2024. http://annalsofrscb.ro/index.php/journal/article/view/1967.