Nguyen Viet Hoang และ Ka Ta Nixon Chen. (2014) An investigation of vietnamese tourists' motivations to visit thailand. Mahidol University:ม.ป.ท.Nguyen Viet Hoang และ Ka Ta Nixon Chen. 2014. An investigation of vietnamese tourists' motivations to visit thailand. ม.ป.ท.:Mahidol University;Nguyen Viet Hoang และ Ka Ta Nixon Chen. An investigation of vietnamese tourists' motivations to visit thailand. ม.ป.ท.:Mahidol University, 2014. Print.