@book{149536,
	author = {World Resources Institute, WRI},
	title = {Biodiversidad},
	publisher = {World Resources Institute, WRI},
	year = {2000},
	address = {Washington},
	note = {Página visitada en junio de 2003. ; Material de difusión destinado a estudiantes. ; Navegadores de Internet},
	url = {http://www.wri.org/biodiv/biodiv_spa.html}
}