Não informado. (1990). Wildlife conservation. New York Zoological Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Wildlife Conservation. Bronx, NY: New York Zoological Society, 1990.
Lua MLA (8ú heag.)Não informado. Wildlife Conservation. New York Zoological Society, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.