APA
United States Geological Survey (USGS) N. E. I. C., . (2006). Magnitude 5.4 west of the Galapagos islands. : United States Geographical Survey, National Earthquake Information Center.
Chicago
United States Geological Survey (USGS) National Earthquake Information Center, . 2006. Magnitude 5.4 west of the Galapagos islands. : United States Geographical Survey, National Earthquake Information Center.
Harvard
United States Geological Survey (USGS) N. E. I. C., . (2006). Magnitude 5.4 west of the Galapagos islands. : United States Geographical Survey, National Earthquake Information Center.
MLA
United States Geological Survey (USGS) National Earthquake Information Center, . Magnitude 5.4 west of the Galapagos islands. : United States Geographical Survey, National Earthquake Information Center. 2006.
ArtículoIdioma: Inglés Detalles de publicación: United States Geographical Survey, National Earthquake Information Center, 2006.Descripción: : [1-9] pTema(s): Clasificación CDD: 
Artículo