ebrary, Inc, Bennett, R. J., & Estall, R. C. (1991). Global change and challenge: Geography for the 1990s. Routledge.
芝加哥风格引文ebrary, Inc, R. J. Bennett, 与 Robert C. Estall. Global Change and Challenge: Geography for the 1990s. London ; New York: Routledge, 1991.
MLA引文ebrary, Inc, et al. Global Change and Challenge: Geography for the 1990s. Routledge, 1991.
警告：这些引文格式不一定是100％准确.