Tiyarattanachai, P., Sathongeay, S. . and Kamolnate, T. (2020) “Handling Difficult Customers Through Effective Communication”, Rajapark Journal. Bangkok, Thailand, 14(34), pp. 322–336. Available at: https://so05.tci-thaijo.org/index.php/RJPJ/article/view/241038 (Accessed: 5 May 2024).