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^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) (primera ed.). Piura: Cordibi. p. 112. ISBN978-9972-50-108-1.{{cite book}}: CS1 maint: multiple names: authors list (link)