Killingsworth, M. J. (2004). Walt Whitman & the earth: A study in ecopoetics. University of Iowa Press.
芝加哥风格引文Killingsworth, M. Jimmie. Walt Whitman & the Earth: A Study in Ecopoetics. Iowa City: University of Iowa Press, 2004.
MLA引文Killingsworth, M. Jimmie. Walt Whitman & the Earth: A Study in Ecopoetics. University of Iowa Press, 2004.
警告：这些引文格式不一定是100％准确.