1. Assadourian, E. (2017). EarthEd: Rethinking education on a changing planet. Washington, DC: World Watch Institute.
2. Bawden, R., Guijt, I., & Woodhill, J. (2007). Social learning towards a sustainable world: Principles, perspectives, and praxis. In A. Wals (Ed.), Social learning towards a sustainable world: Principles, perspectives, and praxis (pp. 133–147). Wageningen: Wageningen Academic Publishers.
3. Berry, T. (1990). The dream of the earth. San Francisco: Sierra Club Books.
4. Cabrera, D., & Cabrera, L. (2015). Systems thinking made simple: New hope for solving wicked problems. Ithaca: Odyssean.
5. Compton, V. (2002). The labyrinth: Site and symbol of transformation. In E. O’Sullivan, A. Morrell, & M. A. O’Connor (Eds.), Expanding the boundaries of transformative learning (pp. 103–119). New York: Palgrave. doi: 10.1007/978-1-349-63550-4_9 .