@book{1850,
	author = {Brook, Martin.},
	title = {Estimating and tendering for construction work /},
	publisher = {Butterworth-Heinemann,},
	year = {1998.},
	address = {Oxford ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/toc/els033/98221619.html}
}