Não informado. (1999). Journal of Avian Biology. Munksgaard International Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Avian Biology. Copenhagen: Munksgaard International Publishers, 1999.
Lua MLA (8ú heag.)Não informado. Journal of Avian Biology. Munksgaard International Publishers, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.