ศรีธิ นงนุช, and ชัยรัตนาวรรณ ยงยุทธ. 2018. “Problems and Solutions for Occupational Group’ Self- Development Held in Mae Suai Municiapality, Mae Suai District, Chiangrai Province”. Journal of Management Science Chiangrai Rajabhat University 6 (1):136-56. https://so03.tci-thaijo.org/index.php/jmscrru/article/view/127373.