Udomsilp, M. “The Elderly Guide Development to Promote Tourism in Koh-Lad-E-Tan Community, Nakhon Pathom Province”. Journal of Thai Hospitality and Tourism, vol. 21, no. 1, Mar. 2026, pp. 61-74, https://so04.tci-thaijo.org/index.php/tourismtaat/article/view/268309.