เชียรวัฒนสุข กฤษดา, and ไกรเลิศ ปิยวรรณ. 2016. “Factors Affecting Purchase Intention for Airline Services A Comparison Study between Thai Smile Air and Thai AirAsia, Bangkok-Krabi Flights”. Business Administration and Management Journal Review 8 (1):11-26. https://so01.tci-thaijo.org/index.php/bahcuojs/article/view/129749.