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↑ Cousteau, Jacques Yves; Sivirine, Alexis (1983). Jacques Cousteau's Calypso. H.N. Abrams. p.102. ISBN9780810907881.
↑ Salomon, David (2012). Penguin-Pedia: Photographs and Facts from One Man's Search for the Penguins of the World. David Salomon. p.271. ISBN9781622093977.
↑ Prostar Sailing Directions 2004 West Coast of South America Enroute. ProStar Publications. 2004. p.35. ISBN9781577855514.
↑ Roy, Tui De; Jones, Mark; Cornthwaite, Julie (2014). Penguins: The Ultimate Guide. Princeton University Press. p.214. ISBN9780691162997.
↑ BirdLife International (2012). Important Bird Areas factsheet: Isla Foca.
↑ Jorge Novoa Cova, Yuri Hooker Mantilla, Álvaro García Olaechea (2010). Naturaleza y Cultura Internacional - CONCYTEC (ed.). Isla Foca, Guía de Fauna Silvestre (in Spanish) (primeraed.). Piura: Cordibi. p.112. ISBN978-9972-50-108-1.{{cite book}}: CS1 maint: multiple names: authors list (link)