Suparmi. “The Implementation of Classroom Management Principles in Teaching English at Vocational High School 3 Padang”. Lesson Journal: Languange, Applied Linguistics, and Education Journal 3, no. 1 (June 30, 2021): 13–17. Accessed May 31, 2023. https://jlesson-upiyptk.org/ojs/index.php/jlesson/article/view/4.