Farley, Joshua C. Ecological Economics: A Workbook for Problem-Based Learning. Washington: Island Press, 2005. Print.
Fukuyama, Francis. The Origins of Political Order: From Prehuman Times to the French Revolution. London: Profile, 2012. Web. <http://www.vlebooks.com/vleweb/product/openreader?id=Exeter&isbn=9781847652812>.
Robbins, Paul. Political Ecology: A Critical Introduction. 2nd ed. Oxford: Wiley-Blackwell, 2012. Web. <https://falmouth.primo.exlibrisgroup.com/discovery/fulldisplay?docid=alma9910955723405136&context=L&vid=44FAL_INST:44FAL_EXE1&tab=Everything&lang=en>.