Nararat Vachiramanaporn และ Apirat Petchsiri. (2009) The European Union and its role in the international environmental arena : the case study of Thailand. Chulalongkorn University:ม.ป.ท.Nararat Vachiramanaporn และ Apirat Petchsiri. 2009. The European Union and its role in the international environmental arena : the case study of Thailand. ม.ป.ท.:Chulalongkorn University;Nararat Vachiramanaporn และ Apirat Petchsiri. The European Union and its role in the international environmental arena : the case study of Thailand. ม.ป.ท.:Chulalongkorn University, 2009. Print.