มงกุฎวิสุทธิ์ ศรีสุข. “Volunteer works of university Lecturers: Case of Thammasat University”. Journal of Business Administration The Association of Private Higher Education Institutions of Thailand 7, no. พิเศษ (June 29, 2018): 73–84. accessed September 13, 2026. https://so02.tci-thaijo.org/index.php/apheitvu/article/view/131723.