บุญสนิท ย. Literature Theses from 2520 to 2530 B.E. : Observations based on Research Methodology. JASU [internet]. 2020 Feb. 7 [cited 2026 Oct. 14];32(2):125-46. available from: https://so04.tci-thaijo.org/index.php/jasu/article/view/239289