Prakobsiri Pakdeepinit. (2007) A model for sustainable tourism development in Kwan Pha Yao Lake Rin communities, Phayao province, upper northern Thailand. Silpakorn University,:ม.ป.ท.Prakobsiri Pakdeepinit. 2007. A model for sustainable tourism development in Kwan Pha Yao Lake Rin communities, Phayao province, upper northern Thailand. ม.ป.ท.:Silpakorn University,;Prakobsiri Pakdeepinit. A model for sustainable tourism development in Kwan Pha Yao Lake Rin communities, Phayao province, upper northern Thailand. ม.ป.ท.:Silpakorn University, 2007. Print.