Academic Sources
Heintzman, P. (2009). Nature-based recreation and spirituality: A complex relationship. Leisure Sciences, 32(1), 72-89.
Heintzman, P. (2008). Men’s wilderness experience and spirituality: Further explorations. In Proceedings of the 2007 northeastern recreation research symposium (pp. 55-59).
Kulczycki, C., & Lück, M. (2009). Outdoor adventure tourism, wellness, and place attachment. Wellness and Tourism: Mind, Body, Spirit, Place, Cognizant Communication Corporation, New York, NY, 165-76.
Heintzman, P. (2013). Spiritual outcomes of park experience: A synthesis of recent social science research. In George Wright Forum (Vol. 30, No. 3, pp. 273-279).
Popular Sources
From Conservation Refugees to Natural Allies – DW
City Nature is a Gateway for Climate Activism – Fair Observer
The Spirituality of the Magic Kingdom – Huffington Post
Indian-Americans celebrate Chhath Pooja on Potomac River – The Indian Panarama