@book{156822,
	author = {Pacific Northwest Pollution Prevention Resource Center, PPRC},
	title = {Alternative Fuels for Fleet Vehicles},
	publisher = {PPRC},
	address = {Seattle},
	note = {Sitio visitado en enero de 2002 ; Navegadores de Internet},
	url = {http://www.pprc.org/pprc/pubs/topics/altfuels.html}
}