APA-ийн эшлэл(7 дахь хэвлэлт)

Killingsworth, M. J. (2004). Walt Whitman & the earth: A study in ecopoetics. University of Iowa Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Killingsworth, M. Jimmie. Walt Whitman & the Earth: A Study in Ecopoetics. Iowa City: University of Iowa Press, 2004.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Killingsworth, M. Jimmie. Walt Whitman & the Earth: A Study in Ecopoetics. University of Iowa Press, 2004.