Silaswan, Kanokwan. “Development Guidelines for Marketing Mix Cultural Tourism In Ratchaburi Province”. Journal of Management Science Nakhon Pathom Rajabhat University 6, no. 2 (December 27, 2019): 131–146. Accessed April 19, 2024. https://so03.tci-thaijo.org/index.php/JMSNPRU/article/view/233133.