Vongtharawat, M., & Pasunon, P. (2020). Cluster Analysis of Airline Passengers Based on the Impact of Perceived Risks Towards Online Airline Tickets Purchasing. RMUTI Journal Humanities and Social Sciences, 8(1), 68–81. Retrieved from https://so05.tci-thaijo.org/index.php/RMUTI_SS/article/view/243183