Integrated Taxonomic Information System (ITIS): Pinguinus (TSN 177036)itis.gov. Viitattu 6.7.2011. (englanniksi)
iucnredlist.org
BirdLife International: Pinguinus impennisIUCN Red List of Threatened Species. Version 2013.2. 2012. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 2.6.2014. (englanniksi)