@book{672, note = {International Edition}, edition = {10th ed.}, address = {Boston :}, publisher = {Pearson/Addison Wesley,}, year = {c2009.}, url = {http://www.loc.gov/catdir/toc/ecip054/2004028156.html}, title = {Modern labor economics :}, author = {Ehrenberg, Ronald G. and Smith, Robert Stewart.} }