มีทรัพย์ทอง ชัชราวรรณ, and ศิริวงศ์ พิทักษ์. “The Meaning and Origin of Volunteer Activities : Process and Guidelines of Students in Faculty of Business Administration. Huachiew Chalermprakiet University”. Business Review Journal 8, no. 2 (December 30, 2016): 165–181. Accessed April 26, 2024. https://so01.tci-thaijo.org/index.php/bahcuojs/article/view/125595.