ebrary, Inc, Wilcox, E. J., & Barron, J. N. (2000). Roads not taken: Rereading Robert Frost. University of Missouri Press.
芝加哥风格引文ebrary, Inc, Earl J. Wilcox, 与 Jonathan N. Barron. Roads Not Taken: Rereading Robert Frost. Columbia: University of Missouri Press, 2000.
MLA引文ebrary, Inc, et al. Roads Not Taken: Rereading Robert Frost. University of Missouri Press, 2000.
警告：这些引文格式不一定是100％准确.