Nokkaew, P., and C. Mankong. “Life and Career Skills in the 21st Century of Junior High School Students Grade 9 in Samut Prakan Province”. Mahachula Academic Journal, vol. 8, no. 1, Apr. 2021, pp. 263-78, https://so04.tci-thaijo.org/index.php/JMA/article/view/244721.