Thonplonkrung, Kesorn, Pakamas Chairatana, and Chawalee Na Thalang. “The Development for Recreational Tourism in Nakhon Nayok Province by Applying Service Marketing Mix in the Recreational Tourists’ Perspective”. Rajapark Journal 15, no. 42 (September 19, 2021): 250–261. Accessed May 5, 2024. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/251469.