Tattaya Kosoontararat และ Yingyot Chiaravutthi. (2011) Consumer willingness to pay for green-label products. Mahidol University:ม.ป.ท.Tattaya Kosoontararat และ Yingyot Chiaravutthi. 2011. Consumer willingness to pay for green-label products. ม.ป.ท.:Mahidol University;Tattaya Kosoontararat และ Yingyot Chiaravutthi. Consumer willingness to pay for green-label products. ม.ป.ท.:Mahidol University, 2011. Print.