“…In the subsequent twenty years, studies focused more on rural tourism and ecological tourism (Lane, 1994;MacDonald & Jolliffe, 2003), and they only gradually extended to tourism with respect to sustainability. The common research subjects include the impacts of tourism (Hunter, 2002), evaluations and indicators of sustainability (Schianetz & Kavanagh, 2008), sustainable development (Sharpley, 2000), tourists' behaviors and attitudes (Budeanu, 2007;Choi & Sirakaya, 2005), and sustainable tourism planning (Bahaire & Elliott-White, 1999;Page, 1997). Ruhanen, Weiler, Moyle, and McLennan (2015) noted that the largest proportion of studies published on sustainable tourism included case studies, empirical studies, and critical reviews.…”