Chaemchamrus K, Erb-im N, Phuanpoh Y, Sermchayut R. Upgrading and Increasing Value of Souvenir Products of Tourist Attractions; Experience the Charm of the Old City Life Style, Phra Nakhon Si Ayutthaya Province. JAM [Internet]. 2022 Sep. 6 [cited 2024 May 19];6(3):1585-603. Available from: https://so02.tci-thaijo.org/index.php/jam/article/view/257035