Hirunwong, A. and Chatraphorn, S. (2005) “Causal Factors of Research Productivity of Vocational Educators in Higher Education”, Kasetsart Journal of Social Sciences, 26(1), pp. 72–81. available at: https://so04.tci-thaijo.org/index.php/kjss/article/view/246245 (accessed: 11 September 2026).