ทวีเจริญกิจ ว, สุรัชเรืองชัย ว. The development of instruction model to promote the problem solving skill thinking of vocational students based on theory of constructionism. Ratchaphruek [internet]. 2019 Feb. 28 [cited 2026 Aug. 26];17(1):86-93. available from: https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/175202