ebrary, Inc, Lewis, D. S., & Slater, W. (2011). World events 2010. ProQuest.
芝加哥风格引文ebrary, Inc, D. S. Lewis, 与 Wendy Slater. World Events 2010. Ann Arbor, Mich.: ProQuest, 2011.
MLA引文ebrary, Inc, et al. World Events 2010. ProQuest, 2011.
警告：这些引文格式不一定是100％准确.