Sulaiman J, Yunus FAN, Wan Ahmad WMR. Professionalism of Technical Teacher in Vocational Education: : Professional Knowledge That Contribute To A Teacher’s Effectiveness. oj-tp. 2019;4(2):42-48. Accessed August 12, 2026. https://journal.uthm.edu.my/index.php/oj-tp/article/view/5091