Chuanpit Thiwaphan. 2004. Tourist opinions on tourist attraction environmental problems : a case study of Koh Samui district, Surat Thani province. Field of Study Environment, Mahidol University;
Chuanpit Thiwaphan. (2004) Tourist opinions on tourist attraction environmental problems : a case study of Koh Samui district, Surat Thani province . Mahidol University/Bangkok.
Chuanpit Thiwaphan. Tourist opinions on tourist attraction environmental problems : a case study of Koh Samui district, Surat Thani province. . Bangkok:Mahidol University, 2004.
Chuanpit Thiwaphan. (2004) Tourist opinions on tourist attraction environmental problems : a case study of Koh Samui district, Surat Thani province . Mahidol University/Bangkok.