Prasanphanich A. The Marketing Mix (4Ps) and Benefits of Online Travel Agency (OTA) in Marketing Promotions of the Hotels in Nakhon Phanom Province. JTHT [internet]. 2019 Feb. 27 [cited 2026 Sep. 15];14(1):3-15. available from: https://so04.tci-thaijo.org/index.php/tourismtaat/article/view/174895