มงกุฎวิสุทธิ์ ศ. “Volunteer Works of University Lecturers: Case of Thammasat University”. Journal of Business Administration The Association of Private Higher Education Institutions of Thailand, vol. 7, no. พิเศษ, June 2018, pp. 73-84, https://so02.tci-thaijo.org/index.php/apheitvu/article/view/131723.