ลักษณะศิริ จ. (2019) “Moral Textbooks by Chaopraya Pra Sadej Surantrathibaudee (M.R. Pia malakul)”, Journal of the Faculty of Arts, Silpakorn University, 38(1), pp. 80–110. Available at: https://so04.tci-thaijo.org/index.php/jasu/article/view/181222 (Accessed: 20 May 2024).