นามนัย ผ., and วงษ์สะพาน ม. “The Development of Learning Achievement on the Topic of Law and Living and Critical Problem-Solving Ability, for the Ninth Grade Students Using Active Activity”. Journal of Roi Et Rajabhat University, vol. 13, no. 3, Dec. 2019, pp. 115-27, https://so03.tci-thaijo.org/index.php/reru/article/view/196727.