Siwilai, Chamlueng, Phamorn Khanthahat, and Tanisorn Yeunyong. 2022. “Organizational Management Factors and Core Competencies of Personnel Affecting Effectiveness of Lopburi Province”. Rajapark Journal 16 (48). Bangkok, Thailand:512-28. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/258468.