Kaewudom Y, jaiuea monrat. Guidelines for Developing Secondary Cities into Tourist Attractions Worth Visiting for Senior Tourists with Spending Potential. soc sci hum utcc [internet]. 2025 Mar. 30 [cited 2026 Aug. 30];45(1):185-210. available from: https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/279125