Lua APA (7ú heag.)
Borboroglu, P. G., & Boersma, P. D. (2013). Penguins: Natural history and conservation. University of Washington Press.
Lua i Stíl Chicago (17ú heag.)
Borboroglu, Pablo Garcia, agus P. Dee Boersma. Penguins: Natural History and Conservation. Seattle: University of Washington Press, 2013.
Lua MLA (9ú heag.)
Borboroglu, Pablo Garcia, agus P. Dee Boersma. Penguins: Natural History and Conservation. University of Washington Press, 2013.
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