Krutch, J. W., & Landacre, P. (2009). The great chain of life (1st University of Iowa Press ed.). University of Iowa Press.
芝加哥风格引文Krutch, Joseph Wood, 与 Paul Landacre. The Great Chain of Life. 1st University of Iowa Press ed. Iowa City: University of Iowa Press, 2009.
MLA引文Krutch, Joseph Wood, 与 Paul Landacre. The Great Chain of Life. 1st University of Iowa Press ed. University of Iowa Press, 2009.
警告：这些引文格式不一定是100％准确.