1. American University (2015), “Sustainability map and tours”, available at: www.american.edu/finance/sustainability/map.cfm (accessed 20 June 2015).
2. Arizona State University (2012), “Sustainability initiatives tour: self-guided tour of the tempe campus”, available at: https://sustainability.asu.edu/docs/gios/ASU-Sustainability-Tour-Map.pdf (accessed 20 June 2015).
3. The piedmont project at Emory university,2002
4. The Emory University campus walking tour: awakening a sense of place;International Journal of Sustainability in Higher Education,2002