มีทรัพย์ทอง ช., & ศิริวงศ์ พ. (2016). The meaning and origin of volunteer activities : process and guidelines of students in Faculty of Business Administration. Huachiew Chalermprakiet University. Business Review Journal, 8(2), 165–181. Retrieved from https://so01.tci-thaijo.org/index.php/bahcuojs/article/view/125595