APA-ийн эшлэл(7 дахь хэвлэлт)

ebrary, Inc, & Caldwell, A. J. (2010). U.S. trade, protectionism and the global economic downturn. Nova Science Publishers, Inc..

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

ebrary, Inc, ба Andrew J. Caldwell. U.S. Trade, Protectionism and the Global Economic Downturn. New York: Nova Science Publishers, Inc., 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

ebrary, Inc, ба Andrew J. Caldwell. U.S. Trade, Protectionism and the Global Economic Downturn. Nova Science Publishers, Inc., 2010.