@book{125476,
	author = {O'Brien, James Jerome, and Plotnick, Fredric L. and ebrary, Inc.},
	title = {CPM in construction management},
	publisher = {McGraw-Hill Professional ;},
	year = {2005.},
	series = {Mcgraw-Hill construction engineering},
	address = {New York :},
	edition = {6th ed. /},
	note = {Previous ed.: 1999.},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=10195645}
}