APA-ийн эшлэл(7 дахь хэвлэлт)

ebrary, Inc. (2008). Opportunity 08: Independent ideas for America's next president (2nd ed.). Brookings Institution Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

ebrary, Inc. Opportunity 08: Independent Ideas for America's Next President. 2nd ed. Washington, D.C.: Brookings Institution Press, 2008.

MLA -ийн эшлэл (9 дэх хэвлэлт)

ebrary, Inc. Opportunity 08: Independent Ideas for America's Next President. 2nd ed. Brookings Institution Press, 2008.