APA-ийн эшлэл(7 дахь хэвлэлт)

Mittlefehldt, S., & Cronon, W. (2013). Tangled roots: The Appalachian Trail and American environmental politics. University of Washington Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Mittlefehldt, Sarah, ба William Cronon. Tangled Roots: The Appalachian Trail and American Environmental Politics. Seattle: University of Washington Press, 2013.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Mittlefehldt, Sarah, ба William Cronon. Tangled Roots: The Appalachian Trail and American Environmental Politics. University of Washington Press, 2013.