Suttakun, L., N. Yutakom, and B. Vajarasathira. “A Case Study of Understanding of the Nature of Science by Elementary Teachers and Their Teaching Practices”. Kasetsart Journal of Social Sciences, vol. 32, no. 3, Dec. 2011, pp. 458-69, https://so04.tci-thaijo.org/index.php/kjss/article/view/246756.