1. Armitage, K. C. 2009. The Nature Study Movement: The Forgotten Popularizer of America’s Conservation Ethic. University Press of Kansas.
2. Bell, J., Poushter, J., Fagan, M., & Huang, C. 2021. In Response to Climate Change, Citizens in Advanced Economies Are Willing To Alter How They Live and Work. Pew Research Center.
3. Blair, D. 2009. The Child in the Garden: An Evaluative Review of the Benefits of School Gardening. The Journal of Environmental Education, 40 (2): 15-38.
4. Cheng, J. & Monroe, M. Connection to Nature: Children’s Affective Attitude Toward Nature. Environment and Behavior, 44 (1): 31-49.
5. Cronon, W. 1996. Uncommon Ground: Rethinking the Human Place in Nature. New York: W. W. Norton & Company.