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APA formatting by BibMe.org.
Freiburg - Environmental Studies & Sustainability. (n.d.). IES Abroad. Retrieved November 9, 2013, from http://www.iesabroad.org/study-abroad/programs/freiburg-environmental-studies-sustainability
Gardner, T. (2009, August 24). Freiburg, a Very Eco-Friendly German City. The Huffington Post. Retrieved November 9, 2013, from http://www.huffingtonpost.com/terry-gardner/freiburg-a-very-eco-frien_b_265669.html
Germany - Freiburg - Green City. (n.d.). A New Hope for Positive Change and Sustainability. Retrieved November 9, 2013, from http://www.ecotippingpoints.org/our-stories/indepth/germany-freiburg-sustainability-transportation-energy-green-economy.html
Harvard Graduate School of Design - Homepage. (n.d.). Harvard Graduate School of Design - Homepage. Retrieved November 9, 2013, from http://www.gsd.harvard.edu/#/projects/transurban-charting-experiments-for-cities-of-the-future-1.html
Hotel Rheingold Reviews, Germany/Freiburg im Breisgau, Black Forest. (n.d.). Hotel Rheingold (Germany/Freiburg im Breisgau, Black Forest). Retrieved November 9, 2013, from http://www.tripadvisor.co.uk/Hotel_Review-g187281-d240772-Reviews-Hotel_Rheingold-Freiburg_im_Breisgau_Black_Forest_Baden_Wurttemberg.html
Innovation Academy. (n.d.). Waste and Water Management. Retrieved November 9, 2013, from http://www.innovation-academy.de/en/international/waste-and-water-management.html
Is this the greenest city in the world?. (n.d.). the Guardian. Retrieved November 9, 2013, from http://www.theguardian.com/environment/2008/mar/23/freiburg.germany.greenest.city
UnData. (n.d.). City population by sex, city and city typeGo to. Retrieved November 9, 2013, from http://data.un.org/Data.aspx?d=POP&f=tableCode%3A240
Water Protection. (n.d.). Freiburg. Retrieved November 9, 2013, from http://www.fwtm.freiburg.de/servlet/PB/menu/1174596_l2/index.html
APA formatting by BibMe.org.