คำแพง เ., and S. Wattanachai. “The validation of constructivist learning environments model cooperate simulation to enhance problem solving for veterinary students”. Journal of Science and Science Education (JSSE), vol. 4, no. 2, Oct. 2021, pp. 231-43, https://so04.tci-thaijo.org/index.php/JSSE/article/view/254310.