@book{75808,
	author = {Rojas, Eddy M.},
	title = {Construction productivity},
	publisher = {J. Ross Pub.,},
	year = {c2008.},
	address = {Ft. Lauderdale, FL :},
	url = {http://portal.igpublish.com/iglibrary/search/JROSSB0000071.html}
}