@book{149896,
	author = {Estados Unidos. Agency for Toxic Substances and Disease Registry, ATSDR},
	title = {Toxicological profile for formaldehyde},
	publisher = {Estados Unidos. Department of Health and Human Services},
	year = {1999},
	address = {Atlanta},
	note = {Página visitada en junio de 2003. ; Navegadores de Internet},
	url = {http://www.atsdr.cdc.gov/toxprofiles/tp111.html}
}