Nat-rada Ngamprong และ Yingyot Chiaravutthi. (2010) Estimation of a hedonic price equation for airlines. Mahidol University:ม.ป.ท.Nat-rada Ngamprong และ Yingyot Chiaravutthi. 2010. Estimation of a hedonic price equation for airlines. ม.ป.ท.:Mahidol University;Nat-rada Ngamprong และ Yingyot Chiaravutthi. Estimation of a hedonic price equation for airlines. ม.ป.ท.:Mahidol University, 2010. Print.