ebrary, Inc, Brown, J. M., Louis, W. R., & Low, A. M. (1999). The twentieth century. Oxford University Press.
芝加哥风格引文ebrary, Inc, Judith M. Brown, William Roger Louis, 与 Alaine M. Low. The Twentieth Century. Oxford: Oxford University Press, 1999.
MLA引文ebrary, Inc, et al. The Twentieth Century. Oxford University Press, 1999.
警告:这些引文格式不一定是100%准确.