Pairin Wechtunyagul. 2008. The intergration of cultural and natural heritage values for sustainable tourism in Koh Kred, Nonthaburi Province. , Silpakorn University;
Pairin Wechtunyagul. (2008) The intergration of cultural and natural heritage values for sustainable tourism in Koh Kred, Nonthaburi Province . Silpakorn University/Bangkok.
Pairin Wechtunyagul. The intergration of cultural and natural heritage values for sustainable tourism in Koh Kred, Nonthaburi Province. . Bangkok:Silpakorn University, 2008.
Pairin Wechtunyagul. (2008) The intergration of cultural and natural heritage values for sustainable tourism in Koh Kred, Nonthaburi Province . Silpakorn University/Bangkok.