Dabphet, Siripen, and Budsaya Sanongkhun. 2020. “Customer Value on Tourism Products and Services between First-Time and Repeat Tourists: The Study of Tourism in Rattanakosin Island”. Thammasat Journal 39 (3):12-38. https://so05.tci-thaijo.org/index.php/tujo/article/view/271566.