References
I. Shaffer, Earl V. Walking with Spring: The First Thru-Hike of the Appalachian Trail. Harpers Ferry, W. Va.: Appalachian Trail Conference, 2004.
II. Shaffer, Earl V. Walking with Spring: The First Thru-Hike of the Appalachian Trail. Harpers Ferry, W. Va.: Appalachian Trail Conference, 2004.
III. Pretty, Jules. “How Nature Contributes to Mental and Physical Health.” Spirituality and Health International 5, no. 2 (2004): 68–78. Accessed 28 October 2019. https://doi.org/10.1002/shi.220
IV. Pretty, Jules. “How Nature Contributes to Mental and Physical Health.” Spirituality and Health International 5, no. 2 (2004): 68–78. Accessed 28 October 2019. https://doi.org/10.1002/shi.220.
V. Bratman, Gregory N., J. Paul Hamilton, and Gretchen C. Daily. “The Impacts of Nature Experience on Human Cognitive Function and Mental Health.” Annals of the New York Academy of Sciences 1249, no. 1 (2012): 118–36. Accessed 28October 2019. https://doi.org/10.1111/j.1749-6632.2011.06400.x