1. Adventure Travel Society (ATS) (1999). The importance of adventure travel and ecotourism. (http://www.adventuretravel.com/seminar_home.htm) Accessed 8th August 1999.
2. Consumer Behaviour as risk-taking;Bauer,1960
3. Risk society: towards a new modernity;Beck,1992
4. The nature of the adventure experience in Queenstown;Berno;Australian Leisure,1996
5. Flow: beyond fluidity and rigidity. A phenomenological investigation;Bloch;Human Studies,2000