Roadrangka, V., and P. Srisukwatananan. “Problems in Professional Experience Training of Student Teachers in Science Education, Faculty of Education, Kasetsart University”. Kasetsart Journal of Social Sciences, vol. 23, no. 2, July 2002, pp. 104-17, https://so04.tci-thaijo.org/index.php/kjss/article/view/243406.