REFERENCES
- Juniper, T. (2012). We must put a price on nature if we are going to save it. The Guardian. 10 August. Retrieved from http://www.guardian.co.uk/environment/2012/aug/10/nature-economic-value-campaign (accessed 17 July 2013).
- Kirchoff, T. (2012). Pivotal cultural values of nature cannot be integrated into the ecosystems services framework. Proceedings of the National Academy of Sciences of the United States of America, 109(46), E3146.
- MA (Millennium Ecosystem Assessment) (2005). Millennium Ecosystem Assessment. Current state and trends assessment. Washington DC: Island Press.
- O'Neill, J., Holland, A., & Light, A. (Eds.) (2008). Environmental values. Abingdon: Routledge.
- UKNEA (UK National Ecosystem Assessment) (2011). Technical Report. Retrieved from http://uknea.unep-wcmc.org/Resources/tabid/82/Default.aspx (accessed 17 July 2013).