Mittlefehldt, S., & Cronon, W. (2013). Tangled roots: The Appalachian Trail and American environmental politics. University of Washington Press.
Lua i Stíl Chicago (17ú heag.)Mittlefehldt, Sarah, agus William Cronon. Tangled Roots: The Appalachian Trail and American Environmental Politics. Seattle: University of Washington Press, 2013.
Lua MLA (9ú heag.)Mittlefehldt, Sarah, agus William Cronon. Tangled Roots: The Appalachian Trail and American Environmental Politics. University of Washington Press, 2013.
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