@book{47871,
	author = {World Health Organization.},
	title = {Air quality guidelines},
	publisher = {World Health Organization,},
	year = {c2006.},
	address = {Copenhagen, Denmark :},
	url = {https://ezproxy.taylors.edu.my/login?url=http://site.ebrary.com/lib/taylorscollege/Doc?id=10190678}
}