สีหะมงคล ญ. (2015) “The Causal Factors Influencing Volunteer Spirit of Vocational Students under The Office of Vocational Education Commission”, Journal of Industrial Education, 14(2), pp. 479–486. Available at: https://ph01.tci-thaijo.org/index.php/JIE/article/view/122450 (Accessed: 29 April 2024).