Insuwanno, P., and K. . Phetvaroon. “An Investigation of Senior tourist’s Expectations and Satisfaction: a Case Study of Andaman Provinces, Thailand”. Journal of International Studies, Prince of Songkla University, vol. 12, no. 2, Dec. 2022, pp. 28-61, https://so03.tci-thaijo.org/index.php/jis/article/view/262593.