Simma, P. “Development of Learning Achievement in Specific Contracts 2 of Bachelor of Law Students by Using the Flipped Classroom Model”. Journal of Humanities and Social Sciences Loei Rajabhat University, vol. 4, no. 2, June 2022, pp. 15-23, https://so01.tci-thaijo.org/index.php/husolru/article/view/260010.