Contrast the style of labor unions in the United States to that found in other countries.

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You can certainly Google this question and up pops many articles.
International labor dialogue (http://www.news.cornell.edu/stories/July05/intl.labor.dialog.lm.html)
Labor Unions in the 21st Century (http://www.idahopublictelevision.org/ntti/nttilessons/lessons2000/yopp.html)

There are others. Good luck in your homework assignment.