Sayapunt U, Hirankitti P. The Competitiveness of Small and Medium Enterprises in Metropolitan and Surrounding Areas. soc sci hum utcc [internet]. 2014 May 1 [cited 2026 Aug. 30];34(2):18-30. available from: https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/188805