Ugo Junior Salamone อูโก้ จูเนียร์ ซาลาโมเน่. “Factors Affecting Decision Making of Thai Tourists in Purchasing Travel Package to Italy”. Dusit Thani College Journal 11, no. 1 (July 18, 2018): 240–257. Accessed May 24, 2024. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/135539.