APA (7th ed.) Zitazioa
Borboroglu, P. G., & Boersma, P. D. (2013). Penguins: Natural history and conservation. University of Washington Press.
Chicago Style (17th ed.) Zitazioa
Borboroglu, Pablo Garcia, eta P. Dee Boersma. Penguins: Natural History and Conservation. Seattle: University of Washington Press, 2013.
MLA (9th ed.) Zitazioa
Borboroglu, Pablo Garcia, eta P. Dee Boersma. Penguins: Natural History and Conservation. University of Washington Press, 2013.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.