Wurm, Stephen A., Mühlhäusler, Peter and Tryon, Darrell T.. Atlas of Languages of Intercultural Communication in the Pacific, Asia, and the Americas, Berlin, New York: De Gruyter Mouton, 1996. https://doi.org/10.1515/9783110819724
"Pacific Coast: Malpelo Island". Coastal and Marine Geology Program, United States Geological Survey, Santa Cruz, California. 2010. Archived from the original on 2 February 2018.
"Coasts of Colombia". Coastal and Marine Geology Program, United States Geological Survey, Santa Cruz, California. 2010. Archived from the original on 3 February 2018.
web.archive.org
"Pacific Coast: Malpelo Island". Coastal and Marine Geology Program, United States Geological Survey, Santa Cruz, California. 2010. Archived from the original on 2 February 2018.
"Coasts of Colombia". Coastal and Marine Geology Program, United States Geological Survey, Santa Cruz, California. 2010. Archived from the original on 3 February 2018.