Pattrapon Vetayasuporn. (2007) Development guideline for sustainable eco-tourism development of "Suay" village in Surin province. Silpakorn University,:ม.ป.ท.Pattrapon Vetayasuporn. 2007. Development guideline for sustainable eco-tourism development of "Suay" village in Surin province. ม.ป.ท.:Silpakorn University,;Pattrapon Vetayasuporn. Development guideline for sustainable eco-tourism development of "Suay" village in Surin province. ม.ป.ท.:Silpakorn University, 2007. Print.