Naowong, J., and W. Keeratichamroen. “A Study of Learning Achievement on Biomolecule Learning Unit Problems Solving Ability and Scientific Mind of Grade 10 Students Using Problem-Based Learning”. KKU Research Journal (Graduate Studies) Humanities and Social Sciences, Vol. 7, no. 3, Nov. 2019, pp. 32-43, https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/226869.