Varayonpinit, Pattakorn, Paratchanun Charoenarpornwattana, and Paranee Svastdi-Xuto. 2021. “Employee Retention of First Line Managers of Thailand’s Food Industry”. HRD Journal 11 (2). Chonburi, Thailand:57-69. https://so01.tci-thaijo.org/index.php/HRDJ/article/view/246759.