Pitiporntapin, S., O. Butkatanyoo, C. Piyapimonsit, T. Thanarachataphoom, S. Chotitham, and U. Lalitpasan. “The development of a professional development model focusing on outdoor learning resources to enhance in-service teachers’ STEM literacy”. Kasetsart Journal of Social Sciences, vol. 44, no. 2, June 2023, pp. 489–496, https://so04.tci-thaijo.org/index.php/kjss/article/view/266278.