Rajit Khongharn รค. The Marketing Mix Affecting the Perception of The Senior Foreigners in Tourism Service Quality: Andaman Area. Dusit Thani College J [internet]. 2018 Jul. 18 [cited 2026 Aug. 27];11(special):18-30. available from: https://so01.tci-thaijo.org/index.php/journaldtc/article/view/135754