Siriboon, Ungkana, Rujira Rojjanaprapayon, and Korbkul Jantarakolica. 2022. “Customer Relationship Management, Marketing Mix and Intercultural Communication in Context of Private Hospitals and Medical Tourists”. Rajapark Journal 16 (48). Bangkok, Thailand:17-29. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/258993.