@book{531894,
	author = { Eddy M. Rojas. and Rojas, Eddy M.},
	title = {Construction productivity :},
	publisher = {J. Ross Pub.,},
	year = {c2008.},
	address = {Ft. Lauderdale, FL :},
	url = {http://www.loc.gov/catdir/toc/ecip0822/2008029766.html}
}