ebrary, Inc. (2008). Opportunity 08: Independent ideas for America's next president (2nd ed.). Brookings Institution Press.
芝加哥风格引文ebrary, Inc. Opportunity 08: Independent Ideas for America's Next President. 2nd ed. Washington, D.C.: Brookings Institution Press, 2008.
MLA引文ebrary, Inc. Opportunity 08: Independent Ideas for America's Next President. 2nd ed. Brookings Institution Press, 2008.
警告：这些引文格式不一定是100％准确.