จินตะกัน อภิชญา. 2020. “IMPROVING COMPANY WORK SAFETY WITH 3E PRINCIPLES AND INCREASE QUALITY OF CLOCK IN CLOCK OUT SYSTEM OF THE COMPANY : A CASE STUDY OF THE COMPANY A”. Journal of KMITL Business School 10 (1):1-13. https://so02.tci-thaijo.org/index.php/fam/article/view/239940.