Ratanaroutai, T., G. Theeragool, and N. Yutakom. “Genetic Concepts of Disadvantaged High School Students in Thailand”. Kasetsart Journal of Social Sciences, vol. 27, no. 2, Dec. 2006, pp. 234-45, https://so04.tci-thaijo.org/index.php/kjss/article/view/246405.