Organización Meteorológica Mundial. (1999). The 1997-1998 El niño event: A scientific and technical retrospective: a contribution to the United Nations Task Force on El Niño for implementation of United Nations General Assembly Resolutions 52/200 and 53/185. Geneva: World Meteorological Organization.
Citación estilo ChicagoOrganización Meteorológica Mundial. The 1997-1998 El Niño Event: A Scientific and Technical Retrospective: A Contribution to the United Nations Task Force On El Niño for Implementation of United Nations General Assembly Resolutions 52/200 and 53/185. Geneva: World Meteorological Organization, 1999.
Cita MLAOrganización Meteorológica Mundial. The 1997-1998 El Niño Event: A Scientific and Technical Retrospective: A Contribution to the United Nations Task Force On El Niño for Implementation of United Nations General Assembly Resolutions 52/200 and 53/185. Geneva: World Meteorological Organization, 1999.