ebrary, Inc, Ryan, A. M., & McCullough, J. B. (2008). Cosmopolitan Twain. University of Missouri Press.
芝加哥风格引文ebrary, Inc, Ann M. Ryan, 与 Joseph B. McCullough. Cosmopolitan Twain. Columbia: University of Missouri Press, 2008.
MLA引文ebrary, Inc, et al. Cosmopolitan Twain. University of Missouri Press, 2008.
警告：这些引文格式不一定是100％准确.