Untimanon O, Chari C, Kaeokaemchan Y, Yogyorn D. Calculating the Economic-Value added Return on Investment in Healthy, Safety, and Happy Workplace Project. JHEALTH [Internet]. 2025Apr.21 [cited 2026Oct.7];48(1):19-32. Available from: https://thaidj.org/index.php/for4d/article/view/16116