Ruang-iem, Gawinrat. “Guidelines for the Development of Marketing Mix to the Fruit Festival in Rayong Province”. Dusit Thani College Journal 14, no. 2 (August 29, 2020): 518–533. Accessed May 23, 2024. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/243456.