Kuptasthien, Natha, and Rapee Kanchana. “Labor Productivity Improvement for Thai SMEs: A Case Study”. International Research Journal on Innovations in Engineering, Science and Technology 5 (December 2, 2019): 18–22. Accessed November 23, 2024. https://ojs.batstate-u.edu.ph/index.php/IRJIEST/article/view/46.