Henderson, C. L. (2007). Oology and Ralph's talking eggs: Bird conservation comes out of its shell. University of Texas Press.
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Chicago Style (17th ed.) Zitazioa
Henderson, Carrol L. Oology and Ralph's Talking Eggs: Bird Conservation Comes Out of Its Shell. Austin: University of Texas Press, 2007.
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MLA (9th ed.) Zitazioa
Henderson, Carrol L. Oology and Ralph's Talking Eggs: Bird Conservation Comes Out of Its Shell. University of Texas Press, 2007.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.