@book{3940,
	author = {Langston, Craig A.},
	title = {Sustainable practices in the built environment /},
	publisher = {Butterworth-Heinemann,},
	year = {2001.},
	address = {Oxford ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/description/els031/2001035007.html}
}