References
- Chawla, L. (1994). In the first country of places. Albany: State University of New York Press.
- Cobb, E. (1993). The ecology of imagination in childhood. Connecticut: Spring publications.
- Keller, S. R., & Wilson, E. O. (Eds.). (1995). The biophilia hypothesis. Washington, DC: Island Press.
- Louv, R. (2009). Last child in the woods. London: Atlantic Books.
- Rilke, M. R. (2011). Letters to a young poet. London: Harvard University Press.