Pettit, M. (1988). Cardinal points: Poems. University of Iowa Press.
芝加哥风格引文Pettit, Michael. Cardinal Points: Poems. Iowa City: University of Iowa Press, 1988.
MLA引文Pettit, Michael. Cardinal Points: Poems. University of Iowa Press, 1988.
警告：这些引文格式不一定是100％准确.